Plant Gender – Grow Weed Easy https://www.growweedeasy.com Learn How to Grow Cannabis with Simple Tutorials Thu, 07 May 2026 04:14:44 +0000 en-US hourly 1 https://wordpress.org/?v=6.9.4 https://www.growweedeasy.com/wp-content/uploads/2018/03/favicon-grow-weed-easy-1.png Plant Gender – Grow Weed Easy https://www.growweedeasy.com 32 32 What happens if I grow seeds from a hermie plant? https://www.growweedeasy.com/what-happens-if-i-grow-seeds-from-a-hermie-plant Sat, 20 Apr 2024 07:21:55 +0000 https://www.growweedeasy.com/?page_id=57536 by Nebula Haze What Happens if You Grow “Hermie” Seeds? Did you find seeds in your buds even though no male plants were around? “Hermie seeds” refer to seeds you find in your cannabis buds without the presence of male plants. Here are trustworthy feminized seeds that always grow buds but never grow seeds. Can...

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by Nebula Haze

What Happens if You Grow “Hermie” Seeds?

Did you find seeds in your buds even though no male plants were around? “Hermie seeds” refer to seeds you find in your cannabis buds without the presence of male plants. Here are trustworthy feminized seeds that always grow buds but never grow seeds.

Can you grow seeds from a hermie cannabis plant? Yes, but there are pros and cons.

Can you grow seeds from a hermie cannabis plant? Yes, but there are pros and cons.

Home Grow Tip: Start with trustworthy feminized seeds (here’s a list of good ones) to ensure every plant makes seedless buds. Save yourself the headache!

Cannabis buds with no seeds = “sinsemilla”
(higher THC and better to smoke than seedy buds)

Seedless sinsemilla big fat marijuana buds in hand (top-shelf, dense buds!)

When you find your homegrown buds have seeds even though zero male plants were in the vicinity, it means a female plant “hermed” (showed hermaphrodite tendencies).

The herm plant released pollen onto surrounding buds, causing seeds to grow. Hermie seeds can appear even if you don’t see any visual signs of herming like pollen sacs or bananas.

Hermie seeds: No male plant was around, but you find seeds in the buds anyway.

Macro cannabis seeds - closeup of good cannabis seeds.

But what happens if you grow the hermie seeds from a hermed plant? Will it cause problems? Keep reading to find out!

Here is what cannabis growers can expect when growing hermie cannabis seeds:

Pros 

  • Free Seeds – These are seeds you find in your buds. Cannabis seeds cost money, and getting free seeds without any effort is appealing.
  • All-Female Plants – If both parents were female (at least mostly female), as is the case with herm seeds, all resulting cannabis plants will be at least mostly female and grow buds. In a way, herm seeds are unplanned, naturally-formed “feminized” seeds.

Cons 

  • More Likely to Herm – Unlike professionally feminized seeds (which are created with a special chemical process), hermie seeds come with more uncertainty. Although the resulting plants may or may not show any signs of herming, unfortunately the chances are higher. That’s because for each herm seed, herming is in its genetics.

With high-quality cannabis seeds, plants usually only herm under major stress like nutrient deficiencies, light stress, heat stress, unusual light cycles, etc. With really great genetics, plants won’t herm under any conditions. But a seed from a hermie parent is more likely to herm even in perfect conditions.

The plant went through extreme stress, so it was no surprise to find seeds.

A cannabis seed growing in buds thanks to the plant being a herm and growing male pollen sacs

Why growers don’t want cannabis seeds that are more likely to herm:

  • Higher Chance of More Seedy Buds – Again, it is possible your buds won’t grow seeds, but seedy buds are more likely. This is because the genetics came from cannabis plants that produced seeds without the presence of a male plant. Even if you don’t see evidence of plants herming, like pollen sacs or yellow hermie bananas on the buds, the buds may have seeds in them after harvest.
  • Possibly Worse Yields & Bud Quality – If buds get a few seeds, it won’t affect your yields or bud potency much. But seeds take energy to grow. If your plant grows tons of seeds because it herms, you’ll end up with smaller buds that may have lower potency or smell than expected. Sadly, when growing hermie seeds, it’s impossible to know ahead of time what you may end up with.
  • Unknown Genetics – Just like starting with any other bag seeds (seeds you find), hermie or not, you don’t know how the plants will grow. Although it may seem like herm seeds would be an exact clone of the “mother” plant, that’s not how it works, due to the genetic reality of herming. Unlike starting with seeds from a trustworthy breeder, you can’t know what to expect as far as how the plant grows, how long until it’s ready to harvest, the bud structure, smell, potency, etc. It’s really the luck of the draw.

Sometimes you don’t see pollen sacs or banana, but still get hermie seeds. Female plants that produce seeds without visible pollen sacs or bananas are “hidden herms”. These plants often went through some kind of stress, but not always. Regardless, if seeds are there and no male plants were around, the resulting seeds are herm seeds.

This plant suffered from severe light stress. There were no signs of herming, but buds still grew hermie seeds.

Found seeds in your cannabis buds? Don't know why? Find out today in this tutorial, and get the solution so your buds are totally seedless!

Often you can find symptoms of the herm.

Here, there is a male flower right next to the seed that formed. (click for closeup)

Cannabis pollen touched the hair/pistil/stigma and formed a seed at the base

Growing Hermie Seeds: Summary (What cannabis growers need to know)

It’s clear to see why growers would want to grow herm seeds. They’re essentially free seeds that appear with no effort, and grow all-female plants. That’s appealing.

The main downside to growing herm seeds is that you’re more likely to end up with more hermie plants and seeds in your buds. If it’s just a few seeds in your buds, most home growers wouldn’t care. But seeds take away from the size and potency of buds. If your buds produce tons of seeds, you’ll end up with very little bud to smoke, and it will be less potent than it could be. On top of that, you won’t know what to expect as far as how the plant grows or bud quality until the grow is over.

Related Article: What causes cannabis plants to herm?

Hermie seeds look the same as regular cannabis seeds, but they’re more unpredictable.

Hermie seeds look the same as regular cannabis seeds, but they're more unpredictable.

What happens when cannabis growers use herm seeds anyway?

If you’re wondering what happens when growers try to grow hermie seeds, you’re not alone. Lots of growers have given it a shot.

Let’s explore what happens!

First off, there are plenty of fans. I’ve talked to growers who only use hermie seeds and never buy new ones. They aim to breed a line of plants that always herms just a bit. Enough to make a few seeds each generation. That way they get a steady supply of free seeds without having to deal with male plants. The downside is every generation always has at least some seeds in their buds. A few seeds is probably not a big deal for most home growers. But if things go wrong, you may end up with tons of seeds. Buds that are very seedy can be a pain because they drop seeds everywhere, and seedy buds tend to be smaller with lower bud potency.

Pollen, pictured here, is what causes seedy buds. Pollen can come from a male plant or a hermie plant.

Another example of marijuana pollen sacs opening up - this one has spilled pollen all over a nearby leaf.

So what can happen from growing herm seeds? The main risk is the offspring herming like its parent.

Notice how there are little yellow growths in between the white hairs in these buds? This is a common type of cannabis herm. Each of these yellow “bananas” releases pollen. If your buds grow tons of bananas while buds are early in the flowering stage like this, you could end up with hundreds or thousands of seeds in the surrounding buds.

Yellow “bananas” are a common form of herming.

Notice how there are little yellow growths in these cannabis buds? Each of these "bananas" releases pollen

This next bud is absolutely stuffed with seeds, due to a major herm in the grow room that went unnoticed. There’s little bud left after all the seeds are shaken out. No cannabis grower wants this to happen by accident!

This bud is absolutely stuffed with seeds due to a major herm in the grow room. There's little bud left after all the seeds are shaken out. No cannabis grower wants this to happen by accident!

However, if a herm plant only grows only a few bananas or pollen sacs that release only a little pollen, you may only get a few seeds or no seeds. If the herm happens late in the flowering stage, you may not get any seeds. That’s because seeds need several weeks to form. You typically only get fully formed seeds if a cannabis plant herms relatively early in the flowering stage.

A single lone banana won’t make many seeds, especially this late in the cannabis flowering stage.

A single lone banana won't make many seeds, especially this late in the cannabis flowering stage.

If your hermie seeds grow buds like the first examples with tons of pollen sacs or bananas, you’ll likely end up with tons of seeds. If a hermie plant grows buds like the second example, you may end up with good buds that have very few seeds. Or the buds may not herm at all and you get perfectly seedless buds. It’s all a part of the genetic lottery you’re playing when growing the offspring of herm plants.

If a hermie plant grows buds like the second example, you may end up with good buds that have very few seeds. Or the buds may not herm at all and you get perfectly seedless buds.

The main takeaway is this: good results are possible with hermie seeds, but you’re increasing your risk of running into problems.

If you want to read an example of a grower getting good results with hermie seeds, check this out.

Fascinating Experience from a GrowWeedEasy.com Reader

Greg, a grower from Australia, recently wrote about his experience growing hermie cannabis seeds.

He grew 8 feminized seeds indoors. In his words, “Unfortunately, the grow room underwent some heat stress early in the flowering stage, which resulted in one of the eight plants herming. Naturally, this seeded up most of the rest of them.”

He decided to try germinating 14 of the resulting hermie seeds. To his surprise, all 14 plants grew into healthy females without any signs of hermaphroditism or seedy buds. He stated, “They have all grown out quite nicely. I have not come across a single seed. The buds are dense, so dense you could hammer a nail into them. And trichome production has been excellent, they are sticky like nothing else.”

His hermie seeds grew these beautiful plants.

Greg's hermie seeds grew these beautiful cannabis plants.

Greg said, “I had hypothesized that they would not be feminized and that they would all be hermaphrodites, I’m quite pleased to learn that I was wrong on both counts.”

He mentioned that in the past he had a different experience, “All my previous experience with hermies and the resulting seeds has only been more banana throwing hermies. Those genetics were all bagseed from the shallow gene pool here in Australia though. This last one was the first hermie I have seen since I started purchasing seeds from Seedsman.” He promises to let us know what happens if he tries stressing out a plant on purpose with heat to cause it to herm on purpose.

Here are the plants from Greg’s experiment at harvest.

Here are the marijuana plants from Greg's experiment at harvest.

Greg had different results with these hermie seeds compared to his past experiences, which ended in disaster. It seems he may have found a set of genetics that only herms in stressful conditions. Or perhaps the tendency to herm under stress was not passed down to these particular seeds at all.

These plants are an example of when growing hermie seeds goes “right”. The resulting plants grew dense and frosty buds without any seeds or other problems.

Greg’s experience shows that hermie seeds don’t always produce seedy or banana-filled buds. With the right genetics and stress-free conditions, it’s possible to get quality female plants from seeds made by a hermie mom plant. It just goes to show there can be a lot of variation when it comes to the hermie trait being passed down.

Related Article: Do Feminized Cannabis Seeds Make ‘Hermie’ Plants? [Sometimes]

 

Frequently Asked Questions

Why are they called “Hermie” cannabis plants?

“Herm” or “hermie” is a common nickname for “hemaphrodite”, and hermie seeds come from a plant that grew buds like a female plant, but also pollen like a male plant.

Whether it comes from a male or herm plant, pollen gets on nearby buds and causes seeds to grow. But herms are especially tricky because you may only see the buds and not notice any signs of herming until pollen has already been released.

Learn more about hermie plants.

Male flowers (“pollen sacs”) can look somewhat like traditional flowers when they open up.

 A cannabis herm male flower looks like a yellow flower at the base of the green bud.

Closeup of a herm “banana” among the buds. By the time you can see yellow, it has usually already released pollen.

Example of a marijuana hermie banana on a cannabis bud

What causes hermie plants?

Cannabis plants become hermies in 3 ways:

  • Genetics – Some plants herm no matter what you do, due to their genetics. There’s nothing growers can do about this kind of herming.
  • Stress – Some plants may only herm if they experience a lot of stress. That could include irregular light schedules, heat, high humidity, certain flowering supplements, and other stressful conditions. However, the best cannabis strains are ironclad and won’t herm no matter what.
  • Chemicals – Spraying healthy young cannabis plants with certain chemicals like colloidal silver or gibberellic acid forces them to grow pollen sacs instead of buds. The resulting pollen is used to make commercial feminized seeds.

Stressed plants are more likely to herm.

Heat wave and light stress caused the plant to grow brown curling leaves

How do I prevent hermie plants?

The best way to avoid growing hermie cannabis plants is to start with good genetics from a trustworthy breeder. Good feminized seeds don’t herm no matter way. On top of starting with good genetics, you should take care of your plants and try not to stress them. Lastly, take a second to look at your buds every day, and keep an eye out for signs of herming so you catch it early and quickly dispose of the offending plants.

Watch out for pollen sacs or yellow growths among your buds!

Example of a marijuana hermie banana on a cannabis bud

Why did I find seeds in my buds even though the plant didn’t herm?

Sometimes you don’t see pollen sacs or banana, but still get hermie seeds. Female plants that produce seeds without visible pollen sacs or bananas are “hidden herms”. These plants often went through some kind of stress, but not always. Regardless, if seeds are there and no male plants were around, the resulting seeds are herm seeds.

This “hidden herm” suffered from severe light stress. No visual signs of herming, but buds still had seeds.

Found seeds in your cannabis buds? Don't know why? Find out today in this tutorial, and get the solution so your buds are totally seedless!

How do breeders make feminized cannabis seeds?

The feminized seeds you buy from breeders are created when growers use chemical means to force a female plant to herm. They use that resulting pollen to make the seeds. Since each “parent” plant is a female, and without a male in the mix, all the resulting seeds are all female. As long as the breeders are careful to only choose plants that never herm in natural conditions, the resulting seeds are unlikely to herm.

This female plant was forced to make pollen sacs using colloidal silver. This “feminized” pollen is used to create all-female seeds.

This cannabis plant made pollen sacs that grew a lot like buds

Will herm seeds always grow like the parent?

No, expect variation from herm seeds! It’s intuitive to think that herm seeds are essentially a “clone” of the parent plant. But that’s not how it always works. Why? Pollen and buds each receive a random set of chromosomes from the parent plant.

That means herm seeds might turn out like the original plant, but they might not. The more genetic diversity in the recent history of the plant, the more diverse the resulting seeds might turn out. The genes passed down through pollen is not the same as the genes passed down in the buds, even when coming from the same plant.

This plant from a herm seed is growing like a male plant with some female flowers. (opposite of a typical herm)

This "male" cannabis plant with pistils is actually a hermaphrodite (hermie) marijuana plant

What happens if I grow herm seeds for many generations?

Herm seeds tend to become more consistent with each subsequent generation. Eventually all plants tend to grow in a uniform way due to inbreeding, and become almost like clones of each other. Just remember, the one thing that often becomes most consistent is the tendency to herm each generation.

Closeup of marijuana seeds - look at their cute little stripes :)

 

Conclusion

Should you grow hermie seeds? It depends on you and your situation.

I personally don’t, but I understand why a grower might do it, especially if money is tight. That being said, even expensive cannabis seeds don’t cost much in the grand scheme of a cannabis grow. If you’re going to spend 3-5 months growing a plant, the $100 it costs to buy a bunch of professionally feminized seeds will reward you with plants that grow as expected and produce good yields of beautiful seedless buds. You deserve the best!

Let me know what you think. Have you grown hermie seeds? What happened? Fill out our contact form and let us hear your experience!

~Nebula Haze, co-founder of GrowWeedEasy.com

P.S. Are you seeking in-depth expert guidance for the entire grow process? If so, check out our course below!

Nebula Haze, co-founder of GrowWeedEasy.com with a bunch of beautiful cannabis plants

 


 

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How to Use a Cup of Water to Identify Cannabis Sex in the Vegetative Stage https://www.growweedeasy.com/how-to-use-a-cup-of-water-to-identify-cannabis-sex-in-the-vegetative-stage Tue, 19 Dec 2023 00:22:13 +0000 https://www.growweedeasy.com/?page_id=55158 by Nebula Haze Cannabis plants can be male or female, but only female cannabis plants make buds. Female cannabis flowers are buds, and male cannabis flowers are pollen sacs, which contain low THC and are poor to smoke. Male pollen sacs eventually open and release pollen, which pollinates the female cannabis plants, and causes buds...

The post How to Use a Cup of Water to Identify Cannabis Sex in the Vegetative Stage appeared first on Grow Weed Easy.

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by Nebula Haze

Cannabis plants can be male or female, but only female cannabis plants make buds. Female cannabis flowers are buds, and male cannabis flowers are pollen sacs, which contain low THC and are poor to smoke. Male pollen sacs eventually open and release pollen, which pollinates the female cannabis plants, and causes buds to grow seeds, which also results in smaller buds with lower THC levels.

These days, most home cannabis growers start with feminized cannabis seeds because they grow only female plants, which means every plant will make buds. Other growers watch their cannabis plants as flowers start developing, then identify and remove male cannabis plants.

Feminized cannabis seeds are the best way to ensure that every plant is female. This way you don’t need to worry about identifying the sex of plants!

Feminized cannabis seeds

But if you can’t buy cannabis seeds online, and must start with another source of seeds, there is a strong chance that about half the plants will be male and half will be female.

With standard, non-feminized cannabis seeds, plants grow 50/50 male vs female plants. That means half of the plants won’t make buds and, even worse, cause the buds you do have to make seeds.

If you’re worried some of your plants may be male, here is the easiest way to determine the sex of your cannabis plants while they’re still in the vegetative stagae.

 

How to Identify the Sex of a Cannabis Plant

Here’s how to identify the sex of your cannabis plants even if they’re still in the vegetative stage.

1.) Take a cutting (clone) from the unverified cannabis plant and put it in a glass of water.

I take stems off the plant and put them in a cup of water. You don’t need your cuttings to make roots before identifying the sex. As long as you give light and make sure the cup always has water, the cutting should stay alive long enough to identify the sex.

If you have extra stems, you can take multiple cuttings and put them in the same cup. Some cuttings will show their sex sooner than others, so taking multiple cuttings may speed up the process by a few days in some cases.

1.) Take a cutting (clone) from the unverified cannabis plant and put it in a glass of water.

2.) Label both the clone and the mother plant with the name of the strain so you know which clone came from which corresponding mother plant.

I use disposable cups and write the name on the cup. You could also put a piece of tape on a cup and write the name on that. You should do this step if you’re identifying the sex of more than one marijuana plant at a time. If you don’t label your clones, then all your effort will be for naught because you won’t know which clone is which!

2.) Label both the clone and the mother plant with the name of the strain so you know which clone came from which corresponding mother plant.

3.) Give clones a light schedule with 12+ hours of darkness every day to initiate flowering and get the cuttings to reveal their sex.

Again, you don’t need to wait for the clones to establish roots before changing the light schedule. You can start this immediately after you take the cutting. The cuttings will start flowering even if their roots haven’t formed yet. However, you should make sure they get at least some direct light during their “day” to keep them healthy long enough to reveal their sex.

3.) Give clones a light schedule with 12+ hours of darkness every day to initiate flowering and get the cuttings to reveal their sex.

4.) Clones will reveal their sex in 1-3 weeks.

Look to the joints where leaves meet the stem. Males develop balls and females develop white hairs. Click here for more information and pictures about how to sex a cannabis plant.

Female cannabis plant – The first flowers of a female cannabis plant looks like this. You will see white hairs coming where leaves meet the stem.

Female cannabis plant - The first flowers of a female cannabis look like this. You will see white hairs coming where leaves meet the stem. This is an amazing closeup example of a female pre-flower on a growing marijuana plant - Showing a thin, pointy calyx and two white hairs (pistils).

Notice the white wispy hairs at the “joints” where the leaves meet the stem. You can see from my fingers at the top, for scale.

Female cannabis plants showing its first flowers. Notice the white wispy hairs at the "joints" where the leaves meet the stem.

This is what female cannabis flowers look like at the top of the plant. You will notice white hairs emerging from the leaves.

This is what female cannabis flowers look like at the top of the plant. You will notice white hairs emerging from the leaves.

Male cannabis plant – The first flowers of a male cannabis plant look like this. You will see little balls, like grapes, that appear in the same place as female plants. Male pollen sacs often also appear at the top of the cutting.

Male cannabis plant - The first flowers of a male cannabis plant look like this. You will see little balls, like grapes, that appear in the same place as female plants. Male pollen sacs often also appear at the top of the cutting.. What a cute male marijuana pre-flower - it's a pollen sac that looks like it's on a little "stem"

Male pollen sacs are tiny and hard to see at first, but pollen sacs quickly start growing in bunches that are easy to identify. Look how tiny this pollen sac is compared to my finger.

Male pollen sacs are tiny and hard to see at first, but pollen sacs quickly start growing in bunches that are easy to identify.

Here are male pollen sacs after they start growing in bunches. You know for sure this is a male plant when you see bunches of balls without any white hairs.

Here are male pollen sacs after they start growing in bunches. You know for sure this is a male plant when you see bunches of balls without any white hairs. Male cannabis plant - The first flowers of male cannabis plant look like this. You will see little balls, like grapes, that appear where leaves meet the stem.

5.) Remove male cannabis plants. 

Once you have determined the sex of your clones, you should make sure you throw away any corresponding male plants. Or at least move them to somewhere safe so their pollen can’t get to the buds of your female cannabis plants by accident.

Now you can grow your known-female cannabis plants with confidence. Once they start flowering, they will make the same type of flowers as the cuttings you took. Continue to care for your female cannabis plants with a ton of light, no nutrient deficiencies, and consistent 12-hour dark periods, and don’t let them get hot during the last 2-3 weeks before harvest.

Mission Complete: You know the sex of your cannabis plants and have only bud-making plants left.

It’s bud time!

Cannabis buds in hand

Click here for a list of recommended beginner cannabis strains (all-female seeds unless otherwise indicated)

 

The post How to Use a Cup of Water to Identify Cannabis Sex in the Vegetative Stage appeared first on Grow Weed Easy.

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The Ultimate Guide to Sexing Cannabis Plants Before the Flowering Stage https://www.growweedeasy.com/how-to-tell-if-a-cannabis-plant-is-male-or-female-before-flowering Fri, 18 Aug 2023 04:04:41 +0000 by Nebula Haze Male cannabis plants don’t make buds, only female cannabis plants make buds. Yet naturally, with regular cannabis seeds, about 50% of cannabis plants end up being male. Cannabis Sex Matters: Female Buds vs Male Pollen Sacs (click for closeup). Male plants don’t make buds! Only female cannabis plants make buds. Male plants...

The post The Ultimate Guide to Sexing Cannabis Plants Before the Flowering Stage appeared first on Grow Weed Easy.

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by Nebula Haze

Male cannabis plants don’t make buds, only female cannabis plants make buds. Yet naturally, with regular cannabis seeds, about 50% of cannabis plants end up being male.

Cannabis Sex Matters: Female Buds vs Male Pollen Sacs (click for closeup). Male plants don’t make buds!

Male cannabis plants don't make buds, only female cannabis plants make buds. Yet naturally, with regular cannabis seeds, about 50% of cannabis plants end up being male.

Only female cannabis plants make buds. Male plants produce pollen sacs that are low in THC, not good to smoke, and cause nearby female buds to grow seeds.

Unfortunately, male pollen sacs are not useful to most home cannabis growers unless you’re a breeder. Identify and remove male cannabis plants ASAP.

When pollen sacs open up, they look like white, yellow, green, or purple flowers (pretty!), but they spread pollen everywhere, which pollinates your female plants. They can also accidentally pollinate any nearby female plants in the area. This is not good for bud quality for you and any of your neighbors who grows. Additionally, male pollen sacs are harsh to smoke and don’t contain high levels of THC or other cannabinoids.

Male pollen also causes female plants to produce small yields of lower-potency, seedy buds. Most home growers should try to get male plants out of the grow room as soon as possible.

 

How to tell if a cannabis plant is male or female before flowering?

Visually, you usually can’t tell the difference between male and female plants until they start flowering (making either male flowers/pollen sacs or female flowers/buds), especially when it comes to younger plants.

There are 3 main ways to tell a marijuana plant’s sex while it is still in the vegetative stage.

There are 3 main ways to tell a marijuana plant's sex while it is still in the vegetative stage.

As a result, most cannabis growers identify and toss male plants as soon as possible. That means for a home cannabis grower starting with regular seeds (for example, seeds you find in your weed), about half of your plants won’t make buds and will need to be tossed. Those are terrible odds, and as a grower, you deserve better.

Luckily, there are 3 different ways to determine cannabis plant sex before the flowering stage, but only one way to ensure that all your plants are female. It’s important to get rid of any male plants as soon as possible, because not only do they take up room that could be filled with bud-making plants, the pollen released by male cannabis plants will pollinate all your female plants and cause seedy buds.

3 ways to tell if a plant is male or female before initiating the marijuana flowering stage

  1. Start with feminized seeds (or female clones) – Best for most home cannabis growers. Starting with feminized seeds or female clones from a trustworthy source guarantees that 99.9% of cannabis plants end up being bud-making female plants.
  2. Genetic testing – Send a piece of a leaf from your young plant to a lab to test for the sex. This can be expensive and is often not 100% accurate.
  3. Examine the “pre-flowers” – Look at the cannabis pre-flowers (little versions of male or female flowers that sometimes appear in the vegetative stage at the joints where the fan leaf meets the stem). This technique works better for some cannabis strains than others, as some plants start growing pre-flowers within 3 weeks of germination, while others may not grow any pre-flowers until 6+ weeks after germination. Pictures below.

 

1.) Start with feminized cannabis seeds (or female clones)

This is the best option for most home cannabis growers. Starting with feminized seeds or female clones guarantees  that nearly 100% of cannabis plants are bud-making female plants. The good news is that feminized cannabis seeds are widely available almost anywhere in the world. Learn more about feminized cannabis seeds.

Learn where to safely buy cannabis seeds online.

Best for most home cannabis growers. Starting with feminized seeds or female clones guarantees 100% of cannabis plants are bud-making female plants.

 

2.) Genetic testing

You can send a piece of a leaf from a 3-week old cannabis seedling and get them to do a genetic test to determine if it’s male or female. The downside of this technique is cannabis genetics are a bit odd. Plants don’t always have neatly separated male and female chromosomes, which means lab testing can occasionally produce false positives and negatives. In other words, some plants marked as “female” may be male, and some plants marked as “male” may actually be female. Some plants may end up being hermaphrodites. However, lab testing is used by some commercial growers as it does greatly increase the chance that all plants end up being female.

You usually can’t look at a cannabis plant this young and tell if it’s male or female, but a genetic test from the lab can sometimes give you a clue…

 

3.) Examine the “pre-flowers”

The usefulness of this last method depends heavily on your genetics, as some strains show pre-flowers at a very young age, while others may take weeks or months before they reveal their sex via pre-flowers in the vegetative stage. Male plants tend to show their pre-flowers before female plants.

Essentially, the goal with this method is to examine the vegetative cannabis plant at future bud sites, where pre-flowers can grow, and look for early signs of male or female plants. Pre-flowers are small buds/pollen sacs that develop at the nodes (the junction where the stems and leaves meet) while the plant is still in the vegetative stage.

The base of a leaf is the best place to look for pre-flowers. Pre-flowers appear as soon as 3 weeks from germination for some strains. However, some strains may take 6+ weeks before they produce pre-flowers.

Look for pre-flowers at the base of the leaf. Typically males show before females.

This is what male vs female cannabis preflowers look like.

Look at the cannabis "pre-flowers" (little versions of flowers that sometimes appear in the vegetative stage at the joints where the fan leaf meets the stem). This technique works better for some cannabis strains than others, as some plants start growing pre-flowers within 3 weeks of germination, while others may not grow any pre-flowers until 6+ weeks until after germination

Female pre-flowers will also produce wispy white “hairs” that emerge. These are technically called stigmas, and commonly mistakenly called “pistils” by cannabis growers.

If you see these white hairs, that means you’re looking at female pre-flowers.

Example of wispy white pistils (pre-flowers) on a female cannabis plant

If you see bunches of balls, you know for sure you’re looking at male pre-flowers. However, it’s extremely rare to see more than 1-2 pollen sacs per joint when the plant is still in the vegetative stage.

Example of a male cannabis plant showing it's first flowers - the pollen sacs almost look like bunches of grapes

Hint: Male cannabis pre-flowers tend to be shaped somewhat like a spade from a deck of cards.

Male cannabis plants make pre-flowers that look somewhat like a "Spade"

Here is a diagram to help you know exactly what you’re looking for. White hairs (aka “stigmas” or sometimes called “pistils”) means female flowers.

Cannabis flower anatomy - Female vs Male pre-flowers diagram by GrowWeedEasy.com

Note: If you see green hairs, those are “stipules” and not pre-flowers. Ignore the stipules.

Read the complete tutorial on how to check male vs female preflowers.

Hermies, bananas, and random pollen sacs

Note: Some cannabis plants produce both male and female flowers. These hermaphrodite plants (affectionately called hermies) should be tossed just like male plants because their pollen sacs also can cause all the buds in your grow room to get seedy if the pollen gets released. Starting with good genetics and taking good care of cannabis plants is the best way to prevent them from “herming”.

If you see a mix of pollen sacs and buds (or little pale or yellow “bananas” growing among the buds), you have a “hermie” which should be treated like a male plant and tossed to prevent pollination.

Male plants, hermies and bananas are not good. The first sign is "bananas" or "balls" where buds should be

FAQs (Frequently Asked Questions)

How can I make a male plant female?

  • You can’t – There is no safe or reliable way to consistently turn a male cannabis plant into a female cannabis plant. It is a better idea to try to start with all-female plants, or identify and remove male cannabis plants as soon as possible. Oddly enough, it is possible to make a female plant grow sacs like a male for the purposes of making feminized seeds.

What are the early signs of a male plant?

  • Spade-shaped “balls” at the joints – Look where leaves meet the stem. If you see “balls” (pictured above) then it is not a female plant.

When can you tell if your plant is male or female?

  • 3 weeks at the soonest – 3 weeks from germination is typically the earliest a lab will take a leaf sample from a plant to test for sex. Visually, some cannabis plants reveal their sex as early as 3 weeks from germination via pre-flowers. These appear even in the vegetative stage for many strains. However, some strains may take 6+ weeks before they grow pre-flowers, so this isn’t the most reliable method. Your best bet is to start with all-female plants!

When you know every single plant is female, you can fill your grow space like this and know every plant will make buds.

3 weeks at the soonest - Some cannabis plants reveal their sex as early as 3 weeks from germination via pre-flowers. These appear even in the vegetative stage for many strains. However, some strains may take 6+ weeks before they grow pre-flowers, so this isn't the most reliable method. Your best bet is to start with all-female plants!

 

Summary: How to tell if a cannabis plant is male or female before flowering?

There are three main ways to identify the sex of marijuana plants before they start flowering:

  1. Start with feminized seeds or clones. This is the best option since it guarantees 100% female plants (as long as you start with a good breeder). Feminized seeds can be purchased from reputable seed banks (currently, I’m using Seed Supreme, though there are many excellent cannabis seed banks).
  2. Genetic testing can identify sex early on, but results aren’t always accurate. It also tends to be expensive.
  3. Examine preflowers once they emerge. This works better for fast-showing strains. Check for female wispy white hairs or male spade-shaped flowers at the joints where leaves meet the stem.

While genetic testing and preflowers can help, the ideal solution is to start with feminized seeds or all-female clones. This avoids wasting time and space on male plants that don’t produce buds. Be sure to get feminized seeds from a trusted source and confirm the seller has a solid reputation.

Remove male plants to prevent pollination so you end up with sinsemilla (seedless buds), which are more potent and considered higher quality than seedy buds. Growing only female plants is the best way to guarantee heavy, potent, seed-free yields from your cannabis garden.

About the Author: Nebula Haze

Nebula Haze is an experienced cannabis cultivator and co-founder of GrowWeedEasy.com, the web’s most comprehensive online resource for growing marijuana indoors at home. Since creating the website in 2010, Nebula has dedicated her life to understanding the cannabis plant and teaching fellow growers how to produce huge yields and captivating bud quality at home. Stop paying other people a ton of money for sub-par weed and start growing better weed for a fraction of the cost today!

Check out my easy 10-step guide to growing cannabis.

Nebula Haze is an experienced cannabis cultivator and co-founder of GrowWeedEasy.com, the web’s #1 online resource for growing marijuana indoors at home. She’s dedicated over a decade to understanding the cannabis plant and passing on simple grow techniques to fellow home growers.

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Grow Weed Easy – Learn How to Grow Cannabis Tutorials https://www.growweedeasy.com/ Tue, 17 Oct 2017 22:07:58 +0000 https://www.growweedeasy.com/?page_id=8997 Grow Weed Easy – Learn How to Grow Cannabis at Home GrowWeedEasy.com teaches you the secrets of home grow. Growing weed is easy when you know what to do, but most “how to grow marijuana” tutorials leave you feeling like you need a degree in horticulture. Start Here: How to grow weed Sick Plants? See...

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Grow Weed Easy – Learn How to Grow Cannabis at Home

GrowWeedEasy.com teaches you the secrets of home grow. Growing weed is easy when you know what to do, but most “how to grow marijuana” tutorials leave you feeling like you need a degree in horticulture.

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Even a total beginner can consistently produce top-shelf weed by following our step-by-step home grow tutorials. 100% written by humans who care.

Who Made GrowWeedEasy.com?

Grow Weed Easy.com was started in 2010 by home growers Nebula Haze and Sirius Fourside. Together, they built a free online “encyclopedia of cannabis home grow” with 650+ expert home cannabis cultivation tutorials about every aspect of growing weed.

New to growing cannabis? Beginner growers start here to learn how to grow a few marijuana plants indoors!Pot plant problems? This page will help you diagnose your sick cannabis plants and get the fix!Learn how to train your marijuana plants for better yields - this cannabis plant training tutorial is a free way to get bigger buds!

GrowWeedEasy.com is now the biggest and most comprehensive source of free home grow information in the world.  We show you how easy it is to grow your own marijuana at home.

The GrowWeedEasy.com Ethos

Our Goal: You grow as much top-shelf weed as possible, with as little time and effort needed to grow your desired yields and cannabis bud quality.

Whether you’re a total beginner who wants to start growing cannabis indoors for the first time, or an experienced grower who wants to upgrade your skills to Pro level, this website was built for you.

 


 

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If you’re reading this right now, you want to grow great cannabis at home.

Cannabis plants isn’t a regular house plant, but learning how to grow isn’t as complicated growers make it seem. We’ve spent the last 16 years breaking down the home grow process so anyone can learn it.

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Home grown buds from this "how to grow weed" tutorial

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An indoor cannabis harvest - growing a pile of weed is incredibly rewarding at harvest time!

You may be asking yourself these common growing questions:

“How do I grow marijuana indoors?”

Read this guide on how to grow marijuana indoors. Or check out this article to learn what materials you need to get started growing your own marijuana!

Luckily, it’s really easy to get a cannabis seed to sprout!

A cute young seedling - it's ready to start growing!

“How much money will it cost to get started?”

If you’re considering growing weed, it costs as little as $300 to get started growing or a bit more for a semi-automatic, high-yielding bubbleponics grow system. See examples of yields to expect, electricity use & startup costs for different setups. Read this article to see even more growing styles with different price ranges.

“Where can I get marijuana seeds?”

Check out our How to Buy Marijuana Seeds Online Guide (with delivery to every state of the USA) to safely get your hands on good genetics. Starting with good seeds lets you choose the looks, smell, and effects of your buds!

Learn where it’s safe to buy cannabis seeds online (2026 update).

Where’s is the best place to get cannabis seeds? Click here to get our current marijuana seed bank recommendations in 2026!

What do good cannabis seeds look like?

Cannabis seeds - tan and dark brown tiger strips seeds separated

Learn about the best marijuana beginner strains and how to research and find the right strain.

Cannabis buds are generally green, but can also be pink or purple with certain strains.

Example of purple and green buds that have been grown at home

“How much will electricity cost each month?”

If you’re just growing a few marijuana plants for personal use, it will cost you $20-$100+/month for electricity, depending on what grow lights (electricity) and nutrients you use. On average, I’d say a hobby-size grower might pay about $50/month to grow, but it depends greatly on your setup and local electricity costs! How much will electricity cost each month?

“How can I increase my marijuana yields?”

We have quite a few techniques to choose from or combine! See some of our most popular pages:

Even More Ways to Increase Cannabis Yields

  1. Increase Light Intensity (plus choose right light for desired yields & possibly add CO2)
  2. Manipulate How Plants Grow (a free way to yield more bud indoors)
  3. Provide Right Nutrients (low Nitrogen in the flowering stage, and remember sometimes less is more!)
  4. Control Growing Environment (let the growing environment work for you)
  5. Harvest Plants Properly (most importantly, don’t harvest early!)
  6. Lastly, it’s important to remember that the strain has a major effect on yields!

Two small cannabis plants can yield several ounces of premium weed!

Growing cannabis buds on a small plant like this can give impressive yields without taking that much room or needing much time - get tutorials to grow your own weed like this!

“How can I grow weed privately?”

Read guide on growing weed indoors without anyone knowing. But remember the most important factors to stealth growing: “No tell, no smell, no sell.” Never tell anyone, not even your best friend, that you’re growing. Be on top of preventing smells, and never ever sell cannabis. Breaking one of those 3 principles is how 99% of growers get found out!

“What if my plants get sick?”

If you run into problems, our "diagnose your plant" tool with pictures will help you figure out what's wrong!The most common issue a grower runs into is a pH imbalance. Barring that, your marijuana plants likely either have a nutrient deficiency, heat or light stress, or are being attacked by some sort of marijuana mold, pest or bug. Whether you call it weed, cannabis, sinsemilla, skunk, pot, marijuana, or something else, the plant known as Cannabis Sativa is a hardy weed in the wild and can actually be easy to grow indoors at home when you know what to do.

Growing Medical Marijuana

“Medical marijuana” has become a household name. The body of evidence for medical marijuana in the treatment of cancer and other illnesses is growing every day. And for those who need medical marijuana, growing weed indoors is the perfect way to ensure a safe, regular supply of buds, for cheap.

In fact, when you grow weed indoors for personal use, you often end up with way too much. The Grow Weed Easy website will teach you how to grow your own beautiful huge cannabis colas like this one! If you catch the growing bug like I did, and if you start enjoying the process of tending your cannabis garden just for the sake of gardening, you’re going to have to find a way to press, cook, freeze, and concentrate all your extra buds. 🙂

As you probably know, both medical marijuana and recreational cannabis have been decriminalized or legalized in many places around the world and weed is becoming legal in more places every day! Yet there still aren’t many simple indoor “how to grow weed” guides for beginners (even for those who legally grow, such as medical marijuana users and those who live in places where marijuana is legalized for personal use).

If so, I know how you feel. It can be hard to weed out all the bad information on the internet and find well-researched, free tips or instructions on how to grow your own cannabis. That’s why Grow Weed Easy.com aims to be a simple online resource that explains from start to finish what you need to do when growing cannabis so you can learn how to grow cannabis with great yields and potent buds, even if you only have a small grow space like a closet or even a computer case.

We’ve grown cannabis out of closets and have gotten ounces of buds and you can too. Grow Weed Easy.com covers many popular cannabis cultivation topics, including:

Start Growing Weed Today!

Grow Weed Easy is run by a panel of experienced cannabis growers, including the founders Nebula Haze and Sirius Fourside, who originally teamed together to bring you GrowWeedEasy.com. Due to the demand for more marijuana growing information, we’ve also started an inbox magazine all about how to grow weed, with additional tutorials, tips, and tactics sent to you each week. Simply sign up to start getting free expert growing articles delivered to you! All the information available at GrowWeedEasy.com is completely free and we regularly update the site and make new additions.

Looking for a growing book?

If you are interested in doing a bit of reading or would like to know more about the science behind marijuana hydroponics or horticulture, I strongly recommend viewing our page of Marijuana Grow Book Reviews. Read reviews of marijuana grow books. We would love to hear about your experiences with growing cannabis. Whether you are a pro grower already or are just starting your first plant, we have learned so much from our readers both beginners and masters! If you have any suggestions, comments, concerns, or just want to ask some questions about your marijuana grow, please contact us!

Happy Growing!
Nebula Haze & Sirius Fourside

 

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Is my plant a hermie? She’s growing flowers, but also balls…. Can I still harvest her buds? https://www.growweedeasy.com/is-my-plant-a-hermie-shes-growing-flowers-but-also-balls-can-i-still-harvest-her-buds Tue, 17 Oct 2017 18:59:12 +0000 https://www.growweedeasy.com/?post_type=faq&p=1120 Question: This plant is growing both male and female parts. Is it a hermie? What do I do? Can I pluck the balls and grow her to harvest?

These are two pictures of a single flowering plant that's been in the flowering stage for about 2.5 weeks. She is showing beautiful white hairs / pistils up top.

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Question: This cannabis plant is growing both male and female parts/flowers. Is it a hermie? What do I do? Can I pluck the balls and grow her to harvest?

These two pictures come from a single plant that’s been in the flowering stage for about 2.5 weeks. She is showing beautiful white hairs / pistils up top.

However, on a single 10″ branch, I can see little ball formations (shown in the second plant). They look like male pollen sacs. Could this mean my plant’s a hermaphrodite? This is my first grow in a grow tent. The plant is under a 600w MH grow light. The growing medium is soil (Fox Farms Ocean Forest soil) and my nutrients are the Fox Farms Nutrient Trio for soil.

The balls are only growing on one branch. If she is a hermi, is there a way to amputate the bad branch to protect the rest of the plant?

Also, will she continue forming buds or is it a male plant at this point? Also, this plant is being grown in a grow tent with another female. Should I keep this one around or butcher it now to prevent from pollinating the other (apparently healthy) female plant?

~Cannabis Grower

Hermie plant is growing normal buds / flowers in most placesThe same plant is also growing balls / nuts / pollen sacs on the lower branches, which is how you can tell that this plant is a hermaphrodite. Whenever you have both male and female parts on a plant, the plant is a hermie

Answer: Yes, this plant is a hermie / hermaphrodite.

Learn everything you need to know about hermie cannabis plants

One of the biggest worries with a hermie (plant with both female and male parts) is that the pollen sacs will burst and pollinate your flowers. This will “seed” your buds. In other words, this causes your buds to to grow seeds and focus on producing seeds over fattening buds.

If you do keep her to harvest and she does produce seeds, I recommend against trying to grow these hermie seeds, as it’s very likely they’ll have the same problems as their mother.

The safest option is the pull the plant completely. This will ensure that pollen sacs accidentally pollinate either plant.

If you pull all the balls (plus keep an eye out for new ones), then you’ll probably be able to make it to harvest with mostly unseeded buds. If you miss even a single pollen sac and the buds grow seeds, then just know that seeded buds often have normal potency, but you will get much lower yields. This is why many growers pull down hermies on sight.

Yet if you’ve only got a couple of plants, and you’re willing to be vigilant while looking for new balls, then it’s possible to pull most the balls and let the rest of the buds continue developing.

Sometimes a plant will produce just a couple of these pollen sacs, you pull them off, and that’s it. However, if the plant is constantly popping up new balls or yellow hermie bananas (nanners), then you’re probably better off cutting your losses and just pulling down the plant to protect your other one.

Learn everything you need to know about hermie cannabis plants

Toss plants that keep making pollen sacs as you’ll likely miss one if you let it go too long.

When these male pollen sacs open up and spill their pollen, they will cause all the buds in the area to grow seeds.

Beautiful male marijuana plant with pollen sacs opening up like flowers and spilling pollen onto the leaf below

Another type of hermaphrodite is if you see yellow “bananas” growing in the hairs of the buds. These may be harder to control than the pollen sacs because they start spreading pollen everywhere as soon as they form. Also, if a plant starts producing bananas, it will typically keep growing them until harvest.

 

Learn more about hermaphrodites, pollen sacs, and hermie bananas

 


 

Jump to…

Is my plant a boy or a girl?

Why do I not want male marijuana plants?

Grow Weed Basics: How to Grow Marijuana Tutorial

How often do I water marijuana plants?

What causes cannabis leaves to get dry or crispy?

 

 

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Is my cannabis plant male or female? https://www.growweedeasy.com/cannabis-plant-male-female Tue, 17 Oct 2017 18:59:12 +0000 https://www.growweedeasy.com/?post_type=faq&p=365 When growing marijuana plants for buds, most growers will try to identify and remove male marijuana plants as soon as possible. Cannabis growers weed out male cannabis plants because they don't produce usable buds and will pollinate your female cannabis plants. Pollinated female cannabis will spend all their energy making seeds instead of buds. Because male cannabis plants don't make

More information about why most growers get rid of male marijuana plants

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When growing marijuana plants for buds, most growers will try to identify and remove male marijuana plants as soon as possible. Cannabis growers weed out male cannabis plants because they don’t produce usable buds and will pollinate your female cannabis plants. Pollinated female cannabis will spend all their energy making seeds instead of buds. Because male cannabis plants don’t make buds, there is no reason to have them in your grow room unless you plan to use them for breeding.

More information about why most growers get rid of male marijuana plants

If you start with a female clone or feminized seeds, you don't need to worry about male plants. However, if you've just found seeds, or purchased unfeminized seeds, about half of the resulting plants will be male. Male plants generally show the first signs of pollen sacs 1-2 weeks before the female plant shows it's first signs of white hairs.

A vigilant grower can carefully watch their plants and remove males when they develop the first signs of pollen sacs.

However, you may want to be more proactive and get rid of the male plants before they enter the flowering stage so you don't have to waste the time and energy in caring for plants that you will eventually get rid of. If so, then you can use to following technique to identify and remove all the males from your grow.

How to Determine Sex of a Marijuana Plant

  1. You can wait until your plants naturally show the first signs of their gender and then remove all the males, but that means you have to watch the plants closely the whole time. You also will waste time and energy growing plants only to find out that some or all are male and have to throw them away. If you want to be more proactive and get rid of all male plants right away, then use this technique.
  2. Take a clone from the unverified marijuana plant
  3. Label both the clone and the mother plant so you know which clone came from which corresponding mother. If you don't label them clearly, then all your effort will go to waste!
  4. Once the clones have established roots, change just the clones into flowering mode by providing them with a light schedule of 12 hours on, 12 hours off
  5. The clones should start revealing their gender in a week or two. Males will start developing balls and females will start developing white hairs. Click on the pictures below to see some examples of male and female plants.
  6. Once you have determined the gender of your clones, you should make sure you throw away any corresponding male plants.

 

Take me to more pictures and information about male and female cannabis plants!

 

Pictures of Male Marijuana Plants

Male plants have grape-like balls which form and fill with pollen. The balls will first show up a week or two after changing the plants over to flowering.

A small male marijuana plant showing the first signs of the grape-like male pollen sacsMale Cannabis Plant Close-up with balls in full viewAnother picture of a male cannabis plant showing its balls
Click on thumbnails for larger picture


Pictures of Female Marijuana Plants

Female marijuana plants take a bit longer than males to show their first signs after being changed over to flowering. Female marijuana plants start showing one or two wispy white white hairs where their buds are going to start forming. They usually first show up where the main stem connects to the individual nodes or 'branches'. If a female plant is kept in the vegetative stage long enough (the length of time varies depending on the strain and conditions), then she will start showing the first sign of female hairs even before you move the plant into the flowering stage by changing the light schedule. If you see wispy white hairs appearing on your plant like the ones pictured below, then you know you have a female plant.

Picture showing the first signs of a female cannabis plant

Small weed plant showing the first signs of being a femaleThis female cannabis plant is showing the first signs of being female: white wispy hairs where the main stem connects to the individual nodesFemale cannabis plant starting to grow its first buds/flowers
Click on thumbnails for larger picture

 

Take me to more pictures and information about male and female cannabis plants!

 

 

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What makes buds, a male or a female cannabis plant? https://www.growweedeasy.com/what-makes-buds-a-male-or-a-female-plant Tue, 17 Oct 2017 18:59:11 +0000 https://www.growweedeasy.com/?post_type=faq&p=366 Only a female marijuana plant makes flowers/buds that contain a usable amount of THC. Male marijuana plants only make pollen to fertilize the females with. Most growers will throw away any male plants that they encounter to keep them from fertilizing the female plants. If your female plants do get fertilized, they will use all their energy to produce seeds instead of making buds. This is good if you want seeds, but you will run into the same problem since half of the seeds will also be male.

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Answer: Only female cannabis plants make buds.

Home Grow Tip: Start with “feminized” seeds (here’s a list of good ones) to ensure every cannabis plant is female. (What are feminized seeds?)

Only female marijuana plants make “buds”.

Female cannabis plants make buds.

What is the Difference Between Male and Female Cannabis Plants?

Only a female marijuana plant makes flowers/buds that contain a usable amount of THC. Male marijuana plants only make pollen to fertilize the females with. Most growers will throw away any male plants that they encounter to keep them from fertilizing the female plants. If your female plants do get fertilized, they will use all their energy to produce seeds instead of making buds. This is good if you want seeds, but you will run into the same problem since half of the seeds will also be male.

Male cannabis plants make pollen sacs (low THC compared to buds, bad to smoke, low yields if used for concentrates). Avoid keeping male plants in your grow room because their pollen causes buds to form seeds.

Male plants make non-smokeable “pollen sacs”.

Male cannabis plants make pollen sacs (low THC compared to buds, bad to smoke, low yields if used for concentrates). Avoid keeping male plants in your grow room because their pollen causes buds to form seeds.

The best way to ensure all-female cannabis plants is to use feminized seeds. Feminized cannabis seeds are safely available worldwide in just about every country. If you grow with feminized cannabis seeds, every plant will be female and grow seedless buds. Highly recommended over using seeds you find, which are on average going to be half male plants.

If you would like to start a breeding program to make your own hybrid, try using a method that creates all-female (feminized) seeds at home so that you don’t waste time having to identify and throw out male plants.

Getting clones of female marijuana plants is a way besides buying feminized seeds online from a seed bank to ensure that all your marijuana plants are female.

If you don’t have a choice of seeds, and some of your seeds may be male (like if you just found seeds) then you want to get your plants to reveal their sex right away so you don’t have to waste time and energy on male plants.

Click here for pictures of male and female marijuana plants.

 

How to Identify the Sex of a Marijuana Plant

1.) Take a cutting (clone) from the unverified marijuana plant.

I take stems off the plant and put them in a glass of water (learn how to make clones in a cup of water). Some growers use an aerocloner but that is unnecessary work because you don’t need your cuttings to make roots. As long as you keep a clone in a cup of water with light, it should stay alive long enough to do this process. If you have extra stems, you can take multiple cuttings and put them in the same cup. Some cuttings will show their sex sooner than others, so if you put a bunch in the same cup you may get the sex faster.

I take stems off the plant and put them in a glass of water (learn how to make clones in a cup of water). Some growers use an aerocloner but that is unnecessary work because you don't need your cuttings to make roots. As long as you keep a clone in a cup of water with light, it should stay alive long enough to do this process. If you have extra stems, you can take multiple cuttings and put them in the same cup. Some cuttings will show their sex sooner than others, so if you put a bunch in the same cup you may get the sex faster.

2.) Label both the clone and the mother plant with the name of the strain so you know which clone came from which corresponding mother plant.

I use disposable cups and write the name on the cup. You could also put a piece of tape on a cup and write the name on that. You should do this step if you’re identifying the sex of more than one marijuana plant at a time. If you don’t label your clones, then all your effort will be for naught because you won’t know which clone is which!

I use disposable cups and write the name on the cup. You could also put a piece of tape on a cup and write the name on that. You should do this step if you're identifying the sex of more than one marijuana plant at a time. If you don't label your clones, then all your effort will be for naught because you won't know which clone is which!

3.) Give clones a light schedule with 12+ hours of darkness every day to initiate flowering and get the cuttings to reveal their sex.

Again, you don’t need to wait for the clones to establish roots before you start this process. You can start this immediately after you take the cutting. The cuttings will start flowering even if their roots haven’t formed yet. However, you should make sure they get at least some direct light during their “day” to keep them healthy long enough to reveal their sex.

Again, you don't need to wait for the clones to establish roots before changing the light schedule. You can start this immediately after you take the cutting. The cuttings will start flowering even if their roots haven't formed yet. However, you should make sure they get at least some direct light during their "day" to keep them healthy long enough to reveal their sex.

4.) Clones will reveal their sex in 1-3 weeks.

Look to the joints where leaves meet the stem. Males develop balls and females develop white hairs. Click here for more information and pictures about how to sex a marijuana plant.

Female marijuana plant – The first flowers of a female cannabis plant looks like this. You will see white hairs coming where leaves meet the stem.

Female cannabis plant - The first flowers of a female cannabis look like this. You will see white hairs coming where leaves meet the stem. This is an amazing closeup example of a female pre-flower on a growing marijuana plant - Showing a thin, pointy calyx and two white hairs (pistils).

Notice the white wispy hairs at the “joints” where the leaves meet the stem.

Notice the white wispy hairs at the "joints" where the leaves meet the stem. This is the first signs that this is a female cannabis plant.

This is what female cannabis flowers look like at the top of the plant. You will notice white hairs emerging from the leaves.

This is what female cannabis flowers look like at the top of the plant. You will notice white hairs emerging from the leaves.

Male marijuana plant – The first flowers of a male cannabis plant look like this. You will see little balls, like grapes, that appear in the same place as female plants. Male pollen sacs often also appear at the top of the cutting.

Example of a male marijuana pre-flower - it's a pollen sac that looks like it's on a little "stem"

Male pollen sacs are tiny and hard to see at first, but pollen sacs quickly start growing in bunches that are easy to identify.

A single male pre-flowers appears. Male pollen sacs are tiny and hard to see at first, but pollen sacs quickly start growing in bunches that are easy to identify.

Here are male pollen sacs after they start growing in bunches. You know for sure this is a male plant when you see bunches of balls without any white hairs.

Male cannabis plant - The first flowers of male cannabis plant look like this. You will see little balls, like grapes, that appear where leaves meet the stem.

5.) Remove male marijuana plants. 

Once you have determined the sex of your clones, you should make sure you throw away any corresponding male plants. Or at least move them to somewhere safe so their pollen can’t get to the buds of your female cannabis plants by accident.

Now you can grow your known-female cannabis plants with confidence. Once they start flowering, they will make the same type of flowers as the cuttings you took. Continue to care for your female cannabis plants with a ton of light, no nutrient deficiencies, consistent 12-hour dark periods, and don’t let them get hot during the last 2-3 weeks before harvest.

Mission Complete: You know the sex of your cannabis plants and have only bud-making plants left!

Yay for cannabis buds!

Yay for purple sparkly cannabis buds!

Click here for a list of recommended beginner marijuana strains (all-female seeds unless otherwise indicated)

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Why do I not want male marijuana plants? https://www.growweedeasy.com/why-do-i-not-want-male-marijuana-plants Tue, 17 Oct 2017 18:59:11 +0000 https://www.growweedeasy.com/?post_type=faq&p=367

Only a female marijuana plant makes flowers/buds that contain a usable amount of THC. Male marijuana plants only make pollen sacs that they use to fertilize the females. Most growers will throw away any male plants that they encounter to keep them from fertilizing the female plants. If your female plants do get fertilized, they will use all their energy to produce seeds instead of making buds. This is good if you want seeds, but you will run into the same problem since half of the seeds will also be male.

The post Why do I not want male marijuana plants? appeared first on Grow Weed Easy.

]]> Short Answer: Only a female cannabis plants make buds. The flowers of a female cannabis plant are what we call “buds”. Female flowers are smokable when dried, and contain the most THC. Male cannabis flowers are called “pollen sacs”. Pollen sacs are not good to smoke and contain low amounts of THC compared to buds.

For most growers, male cannabis plants are only used to make pollen to fertilize female plants and make seeds. Most home growers throw away any male plants that they encounter to keep them from fertilizing the female plants and making unwanted seeds.

Only female cannabis plants make buds.

Male vs female cannabis plants - example of male pollen sacs vs female buds

Learn about Male vs Female Cannabis Plants

 

Dig Deeper

With regular cannabis seeds, about half the plants will be male, and half will be female. Growers typically can’t tell the difference between male and female plants until theey start making flowers. (Exception: Pre-flowers can tell you the plant sex ahead of time)

However, only female flowers/buds contain a usable amount of THC.

Male marijuana plants only make pollen sacs, which are not good to smoke. Most growers only want pollen to fertilize female plants and make regular seeds. That’s why it’s recommended that home growers identify and throw away any male plants they encounter. This keeps them from fertilizing the female plants and giving you seedy buds.

If your female plants do get fertilized, they use all their energy to produce seeds instead of making buds. This not only lowers your overall bud yields, but the buds will also be full of seeds.

This is great if you want regular seeds. However the problem with using regular seeds fertilized by a male plant is half of the seeds will also be male plants. Home growers typically want to only put effort into growing plants that will make buds. It’s annoying to have to throw half the plants away, especially since you can’t tell which plants are male or female until they start making flowers.

Home Grow Tip: Start with “feminized” seeds (here’s a list of good ones) to ensure every cannabis plant is female. (What are feminized seeds?)

Example of the flowers of a female cannabis plant (“bud”)

Female cannabis plants make buds.

Male cannabis plants make pollen sacs (low THC compared to buds, bad to smoke, low yields if used for concentrates).

Avoid keeping male plants in your grow room because their pollen causes buds to form seeds.

Example of the flowers of a male cannabis plant (“pollen sacs”)

Male cannabis plants make pollen sacs (low THC compared to buds, bad to smoke, low yields if used for concentrates). Avoid keeping male plants in your grow room because their pollen causes buds to form seeds.

The best way to ensure all-female cannabis plants is to use feminized seeds. Feminized cannabis seeds are safely available worldwide in just about every country. If you grow with feminized cannabis seeds, every plant will be female and grow seedless buds. Highly recommended over using seeds you find, which are on average going to be half male plants.

If you would like to start a breeding program to make your own hybrid, try using a method that creates all-female (feminized) seeds at home so that you don’t waste time having to identify and throw out male plants.

Getting clones of female marijuana plants is a way besides buying feminized seeds online from a seed bank to ensure that all your marijuana plants are female.

If you don’t have a choice of seeds, and some of your seeds may be male (like if you found random seeds in your weed) then you want to get your plants to reveal their sex right away so you don’t have to waste time and energy on male plants.

Click here for more pictures of male vs female marijuana plants.

Breeding for Seeds

If you would like to start a real breeding program to make your own hybrid strains, I recommend using a method that creates all-female (feminized) seeds so that you don’t waste time having to identify and throw out male plants. That’s what some of the most successful seed breeders do to progress their breeding programs much faster than using male plants in their breeding program.

Getting clones of female marijuana plants or buying feminized seeds online from a seed bank are other ways you can ensure that all your marijuana plants are female.

If you don’t have a choice of seeds, and some of your seeds may be male (like if you just found seeds in you buds) than you want to get your plants to reveal their sex right away so you don’t have to waste time and energy on male plants.

How to Identify male and female marijuana plants

You might be interested in…

What are the best strains for beginners?

7 Lessons I Wish Someone Had Given Me When I First Started Growing Weed

How Long Does It Take to Grow Weed?

Check These 7 Things & Cure 99% of Marijuana Growing Problems

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How to Make Feminized Seeds at Home https://www.growweedeasy.com/how-to-make-feminized-seeds Fri, 01 Jul 2016 22:17:57 +0000 https://www.growweedeasy.com/newsletter_issue/how-to-make-feminized-seeds-at-home/ by Nebula Haze (originally inspired in part by this thread from PhenoMenal)


Table of Contents

Introduction to Feminizing Your Own Seeds

5 Steps to Feminized Seeds - Learn how to force female plants to make pollen and create feminized seeds

The post How to Make Feminized Seeds at Home appeared first on Grow Weed Easy.

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by Nebula Haze (originally inspired in part by this thread from PhenoMenal)


Table of Contents

Introduction: How to Feminize Cannabis Seeds at Home

5 Steps to Feminized Seeds – Learn how to force female plants to make pollen and create feminized cannabis seeds

Frequently Asked Questions


 

Introduction to Feminizing Your Own Cannabis Seeds

First of all, what are “feminized” marijuana seeds? Although male and female plants look the same when young, only female cannabis plants make buds. Male cannabis plants grow non-potent pollen sacs instead. Male plants also lower yields and cause seedy buds if they’re left among your female plants for too long. Because male plants don’t make buds and their presence reduces the quality of buds, most growers toss male plants the moment they see pollen sacs forming. However, since about half of regular cannabis seeds end up being male, that means you end up tossing half your plants once they start flowering.

Feminized seeds come from two female plants being bred together, causing all offspring to be female (which means every plant makes buds)

Two female cannabis plants in love - Using the feminization method to make feminized pollen, you can successfully breed two female plants together, and all the resulting offspring will be female plants

While regular seeds make female plants about half the time, feminized seeds only create female plants. That means you won’t need to toss half the plants once they start flowering. But how are feminized seeds made and can you make them at home?

Feminized seeds are created by breeding two female plants together. Because there are no male parents, all the resulting seeds end up being bud-bearing female plants. With feminized seeds, you can count on every plant to produce buds. Learn more about male vs female plants and feminized cannabis seeds.

Feminized seeds are available from seed banks for nearly every popular or famous strain. Breeders understand that a lot of people just want to grow plants for buds, and don’t care about making a robust breeding program (which is one of the main reasons growers want male plants).

You can’t see the difference between male and female plants until they start flowering (unless you do a genetic test). Feminized seeds ensure all plants are female so you don’t need to worry about it. You know that every plant is female from germination.

It's impossible to tell whether a cannabis seedling is male or female until it starts making flowers. At least, not without a genetic test.

So how do seed banks feminize their seeds? How do you breed two female plants together?

The main idea is to force a female plant to produce pollen sacs like a male plant. These flowers (growing on a female plant) create pollen, which can be harvested and used to pollinate another female cannabis plant. The resulting seeds will all end up being female. Can feminizing seeds cause hermaphrodite plants?

Growers can force a female plant to make pollen sacs, and the “feminized” pollen produced can be used to fertilize another female plant. The resulting seeds will only produce female plants.

Another example of marijuana pollen sacs opening up - this one has spilled pollen all over a nearby leaf

How do you force a female plant to make pollen?

There are two main ways to make feminized pollen:

  1. Induce feminized pollen chemically (Recommended) – This is the professional way to feminize seeds and is how reputable seed banks and breeders create feminized seeds to sell to the public. Substances that interact with plant processes such as colloidal silver or gibberellic acid are applied to bud sites of a female plant when they start flowering. Bud sites are drenched daily for the first 3-4 weeks after the switch to 12/12. This causes a female plant to produce pollen sacs which release feminized pollen when they open up. This pollen is used on another female plant to produce feminized seeds. This article will give you step-by-step instructions on how to feminize cannabis seeds using this method.
  2. Rhodelization (Not Recommended!) – In some cases, a female cannabis plant may naturally start making male pollen sacs or bananas, which can self-pollinate the plant. This happens if the plant is stressed, or if the plant is not harvested in time and buds start to die of old age. The plant is basically doing everything it can to make seeds and save the next generation. This method is “natural” and these seeds end up being mostly female. The problem with this method is you’re selecting for plants that naturally turn into hermies (grow both male and female sex organs) without any chemical induction. This means the resulting seeds are much more likely to turn hermie in natural conditions, too. That’s a problem if you don’t want seedy buds every time you harvest. For that reason, it’s highly recommended you don’t feminize seeds this way. It’s also a good idea to toss any and all seeds that are the result of natural herming (for example seeds you find in your buds even though you didn’t grow any male plants).

Read this article for more in-depth discussion about the pros and cons of each method, and how to avoid hermaphrodite plants when producing your own feminized seeds.

Macro closeup of feminized marijuana seeds

Overview: How to Make Feminized Seeds

This is a quick overview of the process, and then I’ll give the full details and steps below.

1.) Buy or Make Colloidal Silver – The article below will teach you how to make colloidal silver at home, as well as show you where to buy it if you don’t want to make it (it’s actually pretty cheap). It’s basically a solution of silver suspended in water and is available online and in health stores as a dietary supplement.

What about gibberellic acid? From what I understand it can be used exactly the same way as colloidal silver to induce female plants to produce pollen, but I don’t know the recipe for an effective gibberellic acid solution. On the other hand, I know that this exact colloidal silver method works for making feminized seeds. That’s why I’ve only included instructions for colloidal silver.  If you’ve used gibberellic acid to make feminized seeds; we’d love to hear from you.

2.) Spray the bud sites of your known female plant daily during the first 3-4 weeks of the flowering stage (until pollen sacs form and start splitting open) – After switching to a 12/12 light schedule to initiate the flowering stage, choose bud sites on your known female plant, and spray/drench them daily with colloidal silver (or gibberellic acid). As the treated flowers develop, they will form into male pollen sacs instead of regular buds. Untreated bud sites on the plant will form into female buds as usual; however, these buds are unsafe to smoke unless you’ve been very careful to make sure they didn’t come into contact with colloidal silver or gibberellic acid during the feminization process as these are unsafe for smoking.

3.) Harvest “Feminized” Pollen – When pollen sacs are ready to be harvested they swell like a balloon and start to open up. Don’t harvest early! Keep spraying the bud sites daily until pollen sacs open or you might end up with empty pollen sacs. When the pollen sacs are ready, the leaf section protecting the pollen will start to crack. At this point, it’s time to collect the feminized pollen. One of the easiest ways to do this is to collect the pollen sacs directly and let them dry for a week. At that point, they can be placed in a bag and shaken to collect all the pollen.

4.) Pollinate Another Female Plant – At this point, take the feminized pollen you’ve collected and use it to pollinate a female plant that has been flowering for about 2-3 weeks (full detailed instructions with a video on how to do this below). Although it’s possible to pollinate the same plant as the original, it’s not recommended in part because the timing doesn’t match up (pollinating buds late in the flowering stage doesn’t produce many seeds). It’s best to pollinate a different female plant that you started budding a few weeks after the original. This increases the number of seeds produced as well as gives the new female plant enough time to develop them to maturity. It also increases genetic diversity compared to self-pollination.

5.) Wait ~6 Weeks After Pollination to Harvest Seeds – After about 6 weeks from pollination, the calyxes on the buds of your female plant will be swollen and fat. You know it’s time to harvest your seeds when they start bursting out. At this point, it’s time to congratulate yourself because you’ve got feminized seeds!

Now that you’ve gotten the overview, here’s the feminization process with detailed step-by-step instructions…

 

Step-By-Step Instructions (with pics!)

1.) Buy or Make Colloidal Silver (or Gibberellic Acid)

Where to get Colloidal Silver (your options):

  1. Buy "ready-to-use" colloidal silver for cannabis seed feminization on Amazon.com!Buy Ready-To-Use Colloidal Silver: Colloidal silver is sometimes used as a dietary supplement, so it’s relatively easy to find (never take it without talking to a doctor first though!). If you’re purchasing colloidal silver, try to find a solution that has at least 30 PPM (parts per million) of silver or higher.
  2. Buy A Colloidal Silver Generator Kit: If you plan on feminizing a lot of seeds, you may want to invest in a generator kit so you can easily make your own endless supply of colloidal silver. This is cheaper in the long run compared to buying it ready-to-use.
  3. Make Your Own: You can make your own colloidal silver generator at home. The following diagram illustrates what you need to do.

How to Make Colloidal Silver at Home

Note: You can purchase gibberellic acid online (a gibberellic acid solution can be used the same way as colloidal silver for feminizing seeds). However, I do not have experience with the gibberellic acid method and don’t know the best way to prepare the solution.

 

2.) Spray the bud sites of your known female plant daily during the first 3-4 weeks of the flowering stage (until pollen sacs form and start splitting open)

Wait until your plant is 5-6 weeks old before initiating the flowering stage. Some young plants seem to have trouble (and take much longer) to go through the feminization process, and their pollen may not be as fertile, so start with a more mature plant.

When plants are ready, change to a 12/12 light schedule to initiate flower formation and put cannabis plants in the flowering stage. Note: If you’re feminizing an auto-flowering plant, start spraying daily when the plant is about 20 days old from seed. This is when most auto-flowering cannabis strains start making flowers.

As soon as you change the light schedule (and maybe even a day or two before) start spraying your plants thoroughly with colloidal silver at every bud site you want to form into pollen sacs.

Spray bud sites thoroughly, drenching them with colloidal silver every single day. Bud sites are located wherever leaves meet stems.

A diagram showing where to spray colloidal silver to produce male pollen sacs. The plant should be sprayed thoroughly at bud sites (where leaves meet a stem)
The above pic shows you where pollen sacs form on the plant (the same places female buds form).

Important! Keep spraying daily until pollen sacs open up. Don’t stop spraying early, even if pollen sacs appear to be already formed, otherwise they may not produce much pollen

A spray bottle / mister is really helpful for spraying bud sites evenly and thoroughly

Get a mister on Amazon

You can choose to treat a single bud site or all the bud sites on the plant. Any untreated bud sites will develop into female buds as usual. If you want to smoke these buds, it’s incredibly important to avoid letting them come into contact with colloidal silver because silver is not safe to smoke. (Don’t worry, feminized seeds don’t contain any silver). I highly recommend letting the whole plant be your test subject so you don’t have to worry about that 🙂

 

3.) Harvest Your Feminized Pollen

When pollen sacs are starting to crack and look like they’re about to open up (or if you can see one has already opened) then your pollen is ready for harvest!

When pollen sacs are cracking and opening up, you’re ready to harvest your pollen!

An example of cannabis pollen sacs opening up to spill pollen

Pollen spilling onto a nearby leaf

Another example of marijuana pollen sacs opening up - this one has spilled pollen all over a nearby leaf

One way to harvest your pollen is to gently and carefully remove all the pollen sacs. Let them dry in open air for a week, and then put them in a resealable bag. If you shake the bag the pollen should easily spill out. You may need to cut a few open yourself.

How to Store Feminized Pollen: Moisture is your main enemy when storing pollen. It can help to double the mass of the pollen collected by adding regular cooking flour. This absorbs moisture during storage and as an added bonus, it increases the volume to make application easier when you get to pollinating. If pollen is totally dry and you triple-bag the pollen-flour mixture and stick it in the freezer (with a good nametag so you know where the pollen came from), your pollen can be stored for a year or longer. You can add a few silica packs (which suck out any remaining moisture) in the bag to make extra sure that the pollen stays totally dry.

 

4.) Pollinate Another Female Plant

When your chosen mother is 2-3 weeks into the flowering stage, take a small paintbrush or powder brush and ‘paint’ your feminized pollen on the developing bud sites you want to pollinate. Bud sites (for both male and female plants) are located wherever you can see leaves meet a stem.

Buds are ready to get pollinated when they look like little bunches of white hairs

Only the buds that come in contact with pollen will grow seeds. You can choose to pollinate all of your buds or just a few on the plant.

Here’s a video by Ed Rosenthal on Youtube showing you how to pollinate buds with pollen. Make sure to touch all the female pistils/hairs with your pollen.

5.) Wait About 6 Weeks Then Harvest Seeds

It usually takes about 6 weeks for your feminized seeds to fully develop. Some plants are literally dying right as the seeds become ready, so to get the most viable seeds, you need to try to keep it alive until the seeds actually start dropping. The seeds can be used right away, or stored in a cool, dry place for a few years. Don’t forget to label them with the date.

This seed is about to burst out of its calyx

The swollen calyx on this marijuana bud is hiding a seed inside. It's just about to burst out!

This is what it looks like when the seed is exposed

Pollinated marijuana bud being held open so new seed is exposed

Now it’s time to germinate your feminized seeds!

Example of marijuana seeds germinating via the "paper towel method"

 

Picture Journal of Making Feminized Pollen with Colloidal Silver

This grower initiated the feminization process on a seedling that was only a few weeks old. As a result, the plant wasn’t able to get big enough to produce many pollen sacs. You will get even better results if you start with a plant that is at least 5 weeks old 🙂

October 18 – Plant right before the switch to 12/12

October 18 - 15 day old cannabis plant about to start the feminization process. This plant was switched to 12/12 and the grower started spraying it with colloidal silver.

October 27 – After being drenched with colloidal silver daily for a little over a week

October 27 - Cannabis plant has been sprayed with colloidal silver daily in order to grow feminized pollen

October 30 – Pollen sacs are forming

October 30 - After daily spraying with colloidal silver, pollen sacs are starting to grow

November 15 – Pollen sacs appear to be almost fully formed and are swelling in size, but haven’t opened up yet. Don’t stop spraying colloidal silver or you may end up with empty sacs!

November 15 - Pollen sacs on this genetically female plant are almost fully formed!

November 27 – Pollen sacs are opening up! Collect the pollen before they’re all open!

November 27 - Pollen sacs are opening up and spilling feminized pollen

 

FAQs – Frequently Asked Questions

How can I identify plant gender before the plant actually starts flowering?

There are a few ways to identify plant gender before the plant actually starts flowering, and each is helpful in different situations.

  1. Use feminized seeds – All your plants will be female if you start with pre-made feminized seeds.
  2. Start with a clone – A clone is an exact copy of another plant. If the “mother” of the clone is a female plant, it means the clone is also female
  3. Look at preflowers (identify plants when they’re 3-6 weeks from seed) – If you know where to look, cannabis plants will actually reveal their gender in the vegetative stage when they’re just 3-6 weeks from seeds. Male plants usually show their gender by 3-6 weeks and female plants usually show their gender around week 4-8 from seed. Learn how to determine the sex in the veg stage by looking at preflowers.
  4. Test the leaves of your seedling in a lab – It’s possible to send in a leaf from a young cannabis plant to a specialized testing company, and they will be able to determine the gender as soon as 3 weeks from seed! Although I haven’t used any of these companies and can’t recommend any in particular, here’s a link to one example just so you can see what I’m talking about. From talking to other growers who use this method, it appears to be accurate.
  5. Take a clone and force it to start flowering – if you take a clone from a vegetative plant, you can force that clone to start flowering and reveal its gender. You’ll know the sex of the “parent” plant by the sex expressed by the clone. This is what I do to determine the sex. I cut off a piece of the plant, stick it in a glass of water (don’t forget to label it with the strain), and give it a 12/12 light schedule until the little piece starts forming either pollen sacs or buds.

The easiest way to identify sex with unknown seedlings? Cut off a small branch of the plant, stick it in a cup of water with a label, and keep it in a sunny window on a 12/12 light schedule until buds or pollen sacs start forming. As long as the plant is getting bright light in the day and long dark nights, it will reveal its sex in just a few weeks (you don’t even need to wait for roots to form).

 

Can I Make a Breeding Program Using Just Female Plants and Feminized Seeds?

Yes, it’s possible to use just female plants and feminized seeds for further breeding, with one major caveat.

Without careful and thorough testing, it may be possible to accidentally select cannabis plants that tend to herm (make male flowers or pollen) and cause seedy buds when you don’t want them to.

For each possible “mother,” clones should be grown in several different environments and tested thoroughly to make sure that the mother plant does not have any tendency to make pollen naturally in normal or stressful conditions. It’s okay if plants grow pollen sacs if induced chemically since that is very unlikely to happen in someone’s garden on accident, but you don’t want plants that will start growing male flowers on their own without chemical induction. Thorough testing of plant hardiness is always important when breeding, but it may be especially important when breeding feminized seeds together.

Are there other reasons I should avoid breeding seeds without males?

The most common reason growers say you shouldn’t do this is because it’s “unnatural” or doesn’t “seem right.” Some growers say you need male plants for genetic diversity. I’ve also heard growers say that the resulting plants will be weaker, sterile, and less potent. Someone once even told me that resulting plants “will be worse in every way.”

As of yet, I haven’t seen any of these claims backed by actual personal experience, or any real-life examples showing why using feminized seeds is not a viable way to breed new strains.

To those who say this type of reproduction just doesn’t seem right, the evolutionary strategy of plants using only female and hermaphrodite plants to breed is actually pretty common and is known as gynodioecy. One example of a plant that only reproduces this way is a flower found in Canada and the US called Lobelia siphilitica, also known as the Great Lobelia. Obviously, this reproduction method isn’t exactly the same as artificial feminization since the pollen production is caused naturally instead of induced chemically, but examples of gynodioecy show that a female flower-based breeding population can exist in the wild even when no plants are purely male.

The Great Lobelia naturally reproduces using only female and hermaphrodite plants. This is similar to the cannabis feminization process because it results in a population of plants that all primarily grow female flowers, with no pure male plants

The Great Lobelia is a flower that reproduces in a way that is somewhat similar to the cannabis fertilization method

When it comes to genetic diversity, the ability to cross out to thousands of different cannabis strains allows you to dramatically increase the gene pool without using male plants. So those are my answers to the common objections of a feminized seed-based breeding program, however I am just a theory-crafter when it comes to this topic. It certainly seems possible that a feminized-only breeding program could run into unforeseen problems down the road, but as far as I know there isn’t any evidence of that so far.

Although I have a few anecdotes from growers who have used only feminized seeds for a few generations, it would be much better to share information from someone who has conducted plenty of testing over several generations. We’d love to hear from you if you have bred more than a few generations using only feminized seeds and want to share your experience.

 

What are the positive aspects of breeding two feminized seeds together?

Besides not having to worry about male plants in the next generation, the main advantage of doing this is you have a much better idea of what you’re working with when it comes to producing the type of buds you’re looking for. When you’re growing a male plant, it has several genes it will pass to its offspring that has to do with how buds develop, but since it’s a male plant those genes aren’t expressed and it’s hard to figure out what they are.

Historically, the way to learn more about the “hidden genes” contained in a male plant is to breed it to several well-known female plants and see how the offspring compare to each other. The genes that don’t come from the known mother plant are assumed to come from the male. Another way of going about this is to take several clones of the same well-known female plant and breed them with many different male plants to see which ones produce the best offspring.

After testing with several pairings, you start to get an idea of the hidden genes a male plant has to offer to its female offspring. This time-consuming process of documenting and identifying good male plants is why proven stud male plants are one of the most valuable and closely guarded types of clones available today.

But the process of finding the right “father” is a little different when you start with two female plants. In this case, you already know quite a bit about the genes of both parents because you can just look at and test the buds of both plants directly. This allows you to pinpoint desirable genes with less guessing and much less time spent growing out and cataloging plants.

Breeding two female plants together offer hints about what kind of buds their genes will produce

 

Why even have male plants then?

In nature, male plants are effective at increasing genetic diversity by ensuring cross-pollination. With only purely male and purely female plants, every resulting seed will have two different parents.

Another big advantage in the wild of having separate female and male plants is sexual specialization. In other words, plants are able to evolve male and female traits separately, so each type of flower can become more specialized at its unique “job.”

However, this isn’t the only successful breeding strategy for plants. In fact, only 6-7% of plants have completely separate male and female plants like cannabis plants do (known as dioecious plants). Most plants grow some mix of male and female flowers on each plant, with different combinations offering different evolutionary benefits.

You might enjoy this scientific article if you want to learn more about the evolution of sex determination in plants and animals: Sex Determination: Why So Many Ways of Doing It?

And although most cannabis strains (at least the good ones) display either purely male or purely female flowers, there are some wild populations (and some strains of hemp) that regularly produce plants with male and female parts on the same plant.

When it comes to artificial selection for breeding new strains, the grower is in charge of cross-pollination, so there’s no need for the plant to specialize in male parts. Pretty much the only thing most growers care about is how female flowers develop. So (unlike in nature) growers have the freedom to choose plants that improve female buds without even having to consider how it might affect male plants.

Only a small percentage of plant species produce male plants like cannabis.

A purple male cannabis plant from Mass Medical Strains

 

Can feminizing seeds result in hermaphrodite plants?

The answer is yes. If you do it the wrong way then feminization can lead to plants with an increased chance of herming. However, with a well-tested and well-bred feminization program, one of the main goals is to breed out any plants with hermaphroditic tendencies that show up under normal conditions. When you buy feminized seeds from trustworthy breeders, you can count on the fact that every plant will end up growing only female flowers and that’s it.

This is a relatively big topic with a lot of opposing opinions so I wrote a whole article about it.

Feminizing seeds the wrong way can result in hermaphrodite plants.

 

Can I pollinate the same plant I collected the pollen from?

Yes, it’s possible. However, it’s not really recommended because, for one, the timing doesn’t match up. By the time your pollen is ready to use, your original plant will already be several weeks past the optimum pollination point. It’s best to pollinate a female plant that has only been flowering about 2-3 weeks, but pollen sacs need more time before pollen is ready to use. It’s also possible to run into unwanted side effects from self-pollination/in-breeding.

One thing to keep in mind is even if you pollinate a plant to itself, the resulting seeds are likely not going to be exact copies of the original (unless the original plant is extremely inbred). The resulting seeds include not just the mother’s expressed genes but also her hidden ones.

Learn more about breeding methods, backcrossing, and how to create & stabilize a new strain

 

 


 

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Link Guide to Growing Cannabis Tutorials https://www.growweedeasy.com/link-guide-growing-cannabis Mon, 01 Feb 2016 03:08:57 +0000 https://www.growweedeasy.com/faq/link-guide-to-growing-cannabis-tutorials/ ...lights Environment Create the Perfect Growing Environment Temperature Tutorial 5 Secrets to Heat Control Control Humidity for Better Buds How to Use Reflective Walls to Increase Yields Indoors How to...

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by Nebula Haze

In addition to the search bar, this link guide helps you navigate through the Grow Weed Easy website. Learn about growing topics you won’t find anywhere else! This is a shortened list of all our cannabis growing tutorials, as the website has over 500 articles and tutorials!

Full List of EVERYTHING on GWE  ← Over 500 Articles & Growing Tutorials!

Start Here – Beginner Grow Guides

Cannabis Life Stages

Choosing…

Common New Grower Topics

Problems & Symptoms

Plant Training (Indoor Tricks for Bigger Yields)

Grow Mediums

Nutrients

Grow Lights

Best LED Grow Light Articles

Environment

Plant Care Tutorials

How to Improve…

Buying Seeds

Recommended Strains

Auto-Flowering Strains

Edibles

Extracts (No Solvents Used in Any Recipe)

And Lots More!

Safety & Preparation

Just for Fun

Submit Pics

Want More?

 


 

Thanks for visiting! We hope our website helps you find the growing tutorials you were looking for. We’ve written hundreds of growing marijuana articles and unfortunately we can’t fit them all on this page, so we encourage you to use the search bar on the right side (or top of the page for mobile users) to search for articles you don’t see here.

Happy growing!
Nebula & Sirius

 


 

Use this "Navigation" page to find the pot growing topic you're interested in!

Use this “Navigation” page to find the pot growing topic you’re interested in, or click here to see every single page on the website!

A young, cute cannabis seedling that has just germinated. It has its whole life ahead of it!


 

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