Brrrr it’s getting cold in the cannabis grow room. When temperatures drop, cannabis plants can start growing slowly and sometimes even stop growing altogether. You can heat the grow room (and here are some cold climate tips) but it can also help to make sure you choose the right genetics because some cannabis strains handle the cold much better than others. It’s always a smart choice to pick a cold-resistant marijuana strain if you know that your grow area will experience chilly temperatures on a regular basis. Learn where you can get seeds.

7 recommended cold-resistant photoperiod strains (6 auto strains below!)

• Amnesia Blue Head Band
• Frisian Dew
• Hindu Kush
• Matanuska Tundra
• Midnight Mass
• Orange Candy (aka Naranchup)
• Tangie x Chocolope

Frisian Dew is an excellent strain for outdoor growing

6 recommended auto-flowering strains for the cold

• Blueberry x Mazar Auto
• Blue Cheese Auto
• Dutch Blue Auto
• Lemon Haze Auto
• LSD-25 Auto
• White Widow x California Snow Auto

One advantage of cold temperatures is it tends to bring out colors like purple and pink

The post 13 Cold-Resistant Cannabis Strains appeared first on Grow Weed Easy.

GrowWeedEasy.com teaches you how easy it is to grow weed. Growing weed can be easy when you know what to do, but most “how to grow marijuana” tutorials make it seem like you need a degree in horticulture.

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Even first-time growers produce great harvests when they follow our tutorials.

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.

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.

Looking for a complete harvest system?

If you want dense, beautiful, great-smelling weed, our new digital book gives you our complete harvest system. Follow the straightforward instructions and massively upgrade your results every harvest. A few small changes can make all the difference.

Get our fool-proof harvest system.

FOR SERIOUS GROWERS ONLY

🌟 $200 Off Special Offer: Enroll today in Home Grow Masterclass!

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.

The key to consistent harvest results is simple: follow a proven system developed for home growers.

You could waste an entire grow learning through trial and error…

Or take the shortcut and harvest a sea of fat, dense, beautiful buds that smell great. At home!

Follow our 5-week course and get walked through each part step-by-step. Build by experienced home growers and honed with hundreds of students since 2019, we ensure you achieve great results on your very next harvest.

Learn How To Grow Top-Shelf Weed at Home!

Start Your First Class TODAY!

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!

“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).

What do good cannabis seeds look like?

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.

“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:

• Super Cropping – A simple technique to bigger yields
• Simplest Guide to Growing Short & Bushy Marijuana Plants
• LST (Low Stress Training) – Training your plants can easily double your harvest!
• Or check out our page on the controversial defoliation technique

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!

“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?”

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. 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:

• A comparison between different cannabis grow lights including experience-based information about LED grow lights
• A page that teaches you the basics of how to grow weed
• Detailed how-to weed growing tutorials
• How to start growing weed tomorrow  (simplest cannabis growing guide!)
• Grow 4 oz with a 100W LED <– An Easy Way to Start Growing!
• Our famous grow guide that teaches you how to grow weed using bubbleponics (hydro).

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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The post Grow Weed Easy – Learn How to Grow Cannabis Tutorials appeared first on Grow Weed Easy.

High temperatures can make growing cannabis a lot harder, even if you’re growing with heat-resistant strains. Droopiness, nutrient deficiencies, crispy brown leaves, and overall slow growth are common symptoms of heat stress, whether your plants are growing indoors or outdoors!

We already have tutorials on controlling heat indoors, circulation and exhaust, as well as how to help outdoor plants during a heatwave, but can a marijuana supplement boost the plant’s ability to survive and thrive in heat without changing anything else about the environment?

Actually…yes! There are 3 specific supplements that are known to help cannabis plants be more overall resistant to heat stress, drought, and high temperatures. Just water your cannabis plants with these all-natural supplements and it will help get them through those too-hot days.

Help your marijuana plants be more resistant to heat stress, unlike this poor baby!

1.) Seaweed Kelp Extract

There are numerous studies showing that seaweed kelp extract is beneficial for heat-stressed plants when used as a supplement. Seaweed kelp extract (available as a liquid or powder) has been shown to increase yields, growth rates, and heat resistance in plants experiencing environmental stress.

Kelp naturally contains lots of trace elements and minerals that have protective properties for plants. Studies have shown that supplementing with kelp can increase plant yields, growth rates, and heat/drought resistance for many species of plants.

Liquid Kelp for heat stress

Kelp Powder for heat stress

Besides protecting against heat, kelp supplements may also enhance seed germination, increase uptake of plant nutrients, and give more overall resistance to frost and fungal diseases.

2.) Humic Acid Supplements

Humic acids are naturally found in the soil, but adding extra can be beneficial. Plant supplements for humic acid are usually derived from leonardite, a substance that is mined near the surface of lignite deposits (lignite is sedimentary rock that formed over millions of years from compressed peat). It is a waxy, brown substance.

Humic acids have protective abilities and can help cannabis plants deal with water stress and drought. Additionally, there is quite a bit of evidence (mostly with many different types of grass, but also with plants like soybeans and corn), that combining humic acid supplements with seaweed kelp extract actually increases the overall effectiveness of both supplements. They may have a synergistic relationship.

Not only do humic acid supplements help protect the plant against water stress, but they may also enhance the heat-resistance benefits of using sea kelp extract. Here’s an example of a liquid supplement that contains both Humic Acid and Kelp (though it’s much more expensive than getting them separately).

Humic acid comes in soluble powder form

Alternative: Kelp + Humic acid together

Get a product with both kelp and humic acid like this bottle. It’s mixed with water you’ll get less total humic acid and kelp compared to buying everything separately, but very convenient.

3.) Silica Supplements

Silica is not a “required” nutrient and your plant won’t suffer from Silica deficiencies. However, supplementing with extra silica offers additional support to plant cell walls. This helps your plants be more resistant to heat and other types of stress. This not only makes cannabis plants more resistant to heat, but it also helps prevent stems from bending or breaking when buds get big and heavy! Have you ever had your buds fall over from being too heavy? Silica can help!

 Bloom City Silica Boost or General Hydroponics ArmorSi are examples of silica supplements made for plants.

Whenever possible, try to get a silica supplement from the same manufacturer that makes your base nutrients to help ensure everything works well together. Like if you’re using Bloom City nutrients, get Silica Boost. If you’re using General Hydroponics, get ArmorSi. However, sometimes that’s not possible. In that case, I recommend Silica Boost as it seems to “play well” with most nutrients.

Heat-Resistant Strains

Every strain is different. Some strains of marijuana are easily stressed by heat, while other strains would thrive in the exact same environment!

When it comes to strains that tend to be more resistant to heat stress…

• Sativa, Haze, African and Hawaiian strains all tend to be more heat-resistant since they originate from hot climates.
• In general, auto-flowering strains to be relatively sensitive to heat since they originated in Siberia, but some strains have been mixed with heat-resistant strains to make them more suitable for warmer climates.
• Many Indica plants, which also come from cool climates, can be surprisingly sensitive to the heat.
• Plants that grow tall and stretchy with narrow-finger leaves tend to be more resistant to heat
• Plants that grow short and squat with big fat leaves tend to struggle more.

If you’re not sure which strain to get, check out some of the suggestions below!

Grow more heat-resistant plants by choosing the right seeds

Example of Heat-Resistant Cannabis Strains

Tangerine Snow

• In addition to doing well in the heat, this strain is overall easy-to-grow and resistant to pests and mold
• Has a surprisingly short flowering stage (8-10 weeks) for a Sativa-dominant strain, and doesn’t get too tall
• Buds produce psychedelic and cerebral effects that are typically not overwhelming and can be a good choice for improving creativity.
• Get Tangerine Snow seeds

The Tangerine Snow strain thrives in the heat. I guess the snow helps keep it cool haha. This grow space experienced temperatures over 95°F (35°C) yet the plants didn’t seem fazed.

Northern Light (version by Royal Queen Seeds)

• There are many versions of Northern Light, and all tend to be hardy strains
• However, the version by RQS is particularly resistant to many problems, including heat. In fact, it thrives in heat.
• Like all RQS strains, the smell and potency are delightful
• Get Northern Light seeds (Royal Queen Seeds version)

These Northern Light buds lived through intense heat and a too-close grow light, yet the resulting buds seemed mostly unaffected

THC Bomb Auto

• An auto-flowering plant that’s ready to harvest about 75 days from germination in my experience
• I’ve grown it several times, and it always turns out well (though they all grow a little different)
• This strain experienced temperatures up to 89 F during the middle of summer, and never skipped a beat
• Very potent strain, and good yields
• Get THC Bomb Auto seeds

Examples of THC Bomb Auto at harvest (this plant survived multiple heat waves)

Although the leaves turned yellow from the heat, the buds continued fattening and produced excellent quality

Looking for more suggestions?

Check out 14 More Heat-Resistant Cannabis Strains!

What are your heat stress secrets? Let us know!

Jump to…

Learn More About Heat and Light Stress

5 Ways to Help Indoor Cannabis Plants Deal with Heat

How to Help Outdoor Marijuana Plants During a Heatwave

Using Coco Coir as a Growing Medium <– One of the most heat-resistant growing mediums!

The post 3 Proven Supplements to Help Cannabis with Heat Stress appeared first on Grow Weed Easy.

Emergency Resources for Sick Seedlings!

If you’ve got unhappy cannabis seedlings, I’ve got the solutions. Sometimes the hardest part of growing cannabis is just germinating the seeds and caring for seedlings. If you’ve never gardened or planted a seed before, you may have to learn everything from scratch. And with expensive and hard-to-get marijuana seeds, there’s a lot of pressure to get things right the first time.

This tutorial will help you with some of the most common seedling problems, so you can quickly get the fix. Make it so that your first few weeks go without a hitch.

Note: At GrowWeedEasy.com, we have resources for almost every common growing problem, so check out our cannabis plant doctor or use the search bar on the side of the website if you have a specific problem.

My Seedling Problem is…

If your seedlings are sick and you’re still investigating the problem, move your grow light up and don’t attempt to train your plants or do anything new until they’re better! If you avoid stressing them out any further, they often recover much more quickly.

Germination Problems

• Soil or Coco: Fail-Proof Germination Guide
• Hydroponics or DWC: Fail-Proof Germination Guide
• Are My Seeds Good? (How to Know if Seeds Are Viable)
• Seedling Growing Upside Down with Root Up

Germination problems? We’ve got you covered!

Yellow Leaves

• Why do seedlings turn yellow? – There are many reasons you might see a yellowing leaf on young plants, but this tutorial breaks down the most common.

This yellow seedling was overwatered. Seedlings don’t like “wet feet”. Too much water is the most common reason you’ll see yellow leaves on seedlings.

Curling or Clawing Leaves

• Clawing or curling leaves – Like yellow leaves, there are actually a few different triggers for clawing or curling, including watering practices and nutrient levels.

In this case, the clawed leaves are also from too much water. Small seedlings in big pots need careful watering until they’re drinking more.

Bad soil will sabotage you! Thick muddy soil prevents seedling roots from getting enough oxygen

Seedling is Wilting or Droopy

If you notice your plant is droopy all the time (even in the mornings right after lights turn on, when plants are at their perkiest), it usually means there’s something going on at the roots. The seedling might be getting too much or too little water at a time, possibly watering too often or infrequently, or its roots could be sick/damaged. The other major cause of drooping and wilting is high or low temperatures, and occasionally really high or low humidity.

• Overwatering vs Underwatering: How do you know?
• Root problems (coco or soil)
• Root Rot (hydro)
• Heat Stress
• Temperature Tutorial
• Humidity Tutorial

This seedling was given too much water for many days. Notice the green algae growing on top of the soil.

Underwatered seedling – When there’s not enough water at the roots, leaves are dark green, possibly clawed or droopy, and growth is slow

In hydroponics, when you see a droopy seedling it usually means there’s something bad happening at the roots

Burnt Leaf Tips

• Usually caused by nutrient burn (too much nutrients)
• Sometimes caused by a deficiency such as a copper deficiency
• Also caused by incorrect pH or overwatering/underwatering

Seedling with a single burnt leaf due to slight underwatering. You can tell it’s not nutrient burn because it’s only affecting a single leaf (nutrient burn tends to affect leaves all over the plant).

Why Are Stems Purple or Red?

• Could just be the genetics
• Can be triggered by cool temperatures or too-bright light
• Sometimes it’s a sign of stress or a deficiency
• Learn whether your red or purple stems are normal

Purple stems are normal for some strains, though they also appear on plants that are cold, stressed or experiencing a nutrient deficiency. Sometimes bright light triggers purple stems, like a tan.

This seedling appears healthy. If you don’t see any other symptoms, you probably don’t need to worry about it. But keep a close eye. If a seedling with purple stems also grows slow or has markings on the leaves, it means something is wrong. Investigate!

Why is My Seedling So Tall?

• If your seedling keeps growing taller and taller without a lot of leaves, it usually means it needs more light.

Tall, “leggy” seedlings need more light. They’re doing their best to stretch towards the nearest light source! Quick aside: Avoid germinating multiple seedlings in the same pot. It can be difficult to separate them.

Why Are Leaves Curling?

• This is often caused by heat stress or overwatering
• Sometimes too much light or very dry air can trigger it, too

These wavy leaves are the result of too much heat, and possibly slight overwatering

Another example of heat damage plus overwatering (the same triggers can be expressed in multiple ways)

More heat damage

Bugs or Pests

• Learn how to avoid Fungus Gnats (most common bug for new growers)
• Other Common Cannabis Pests

Learn more about fungus gnats

Something Else?

• Diagnose Your Sick Plant!

Re-vegging (pictured below) and other plant problems can be hard to diagnose. Use our free plant doctor tool to check your symptoms.

Bonus Articles!

• Common Seedling Problems and Mistakes
• 7 Common New Grower Mistakes and How to Avoid Them
• How to Test Cannabis Seedlings for Sex and Future Potency

​What to Focus on During Your Seedling’s First Month

• Perfect Environment – humidity, temperature, airflow, CO2/fresh air, reflective walls, etc
• Enough Light – If your seedlings are growing tall it means that they want more light! Remember, in the flowering stage your yields will be directly related to how much light your buds are getting!
• Not Too Much of Light – Too much light can hurt your plants even in cool temperatures! Seedlings are more sensitive than adult plants, so be careful not to overload them with light too quickly! If you think your seedlings may be stressed from too high levels of light, move your grow light up a few inches and see if they improve.
• Watering properly (one of the hardest parts for a lot of new growers!) – How to Water Plants Perfectly Every Time. I promise it gets easier!
• Not Too Much Love – Seedlings need some breathing room! (i.e. avoid overwatering, touching/messing with plants too much, giving too high levels of nutrients or supplements, etc.). They want you to love them and watch out for them, but they also need to get work done 🙂
• Start Thinking About Plant Sex – For several weeks after germination, a plant’s sex is hidden and has little effect on how your plants grow. However, if you are not familiar with the difference between male and female plants (only female plants make buds), now is the perfect time to read up!

The post Cannabis Seedling Help Handbook appeared first on Grow Weed Easy.

The following symptoms are for when your cannabis leaves are “clawing” or curling up or curling down. Sometimes known as “The Claw”. I’ll give a short explanation with pictures of each problem, plus links to the solutions! Fix this common (but hard to diagnose) marijuana problem today!

Nitrogen Toxicity

A Nitrogen toxicity is the result of the plant getting too much Nitrogen (usually from too high levels of nutrients overall, or by using a Vegetative nutrient in the flowering stage). It causes dark green leaves and curled tips (“the claw”).

One of the main symptoms of a Nitrogen toxicity is curled tips (“the claw”)

A plant with a Nitrogen toxicity tends to be dark green all over

​

Learn more about a cannabis Nitrogen Toxicity

Wind Burn

Caused by too much wind. You’ll notice that the leaves further from the fan don’t have symptoms.

Example of too much wind on your leaves

Learn more about cannabis wind burn

Bad Soil / Overwatering / Underwatering

You can help prevent over and under-watering your cannabis plants by always starting with good soil or coco coir.

Bad Soil

Bad soil is usually thick and muddy. Plants in poor soil will droop (often with unhappy curly leaves) no matter your watering practices.

Avoid thick soil that stays wet for a long time and doesn’t drain well

Overwatering

Overwatering makes leaves fat with water, and they tend to curl down and droop

Overwatering (especially when combined with heat) can also cause leaves to curl up

This plant was grown in muddy soil, and the curling, unhealthy leaves kept getting worse and worse over time!

​

Underwatering

Underwatering causes symptoms that often look like overwatering, but you’ll know it’s underwatering if the plants perk up each time after you water them.

Root Problems

Although often caused by overwatering, once the roots are sick you’ll see symptoms for a little while even after you start watering your plants properly.

Unhealthy roots can cause all sorts of problems including curling and clawing!

Unhealthy Roots in Soil/Coco

This plant’s roots were damaged from being overwatered and too hot for several days. As a result, the leaves took on a strange, blistery appearance.

This plant suffered from heat combined with overwatering for several days. This damaged the roots and gave it this odd leaf curling.

Learn more about root problem and symptoms

Root Rot

Root rot is something marijuana hydroponic growers can suffer from if pathogens attack the roots. It is often triggered by heat and/or lack of bubbles near the roots.

Root rot can cause curling leaves and brown patches as well as sometimes other nutrient deficiencies

Rootbound

If a plant stays in the same container for too long, the roots will eventually start wrapping around the edges of the pot. This is known as being “rootbound” and causes symptoms similar to other root problems.

A rootbound plant has been in the same container for too long. Roots wrap around the edges and “choke” the plant.

Rootbound plants often droop, appear yellow, get nutrient deficiencies, and stay small. Even if you’re caring for them perfectly!

If you see tons of white roots when transplanted, that means the plant was in that container too long

When this happens, the main solution is to transplant the plant into a bigger container. Another solution is to grow in fabric pots or air pots. These types of pots let air in from the sides, killing the circling roots (“air-pruning” them) and prevents the plant from getting rootbound for months.

To help a rootbound plant, transplant to a bigger container with fresh potting mix

Or start with air pots or fabric pots in order to prevent plants from getting rootbound at all

Heat Stress

If plants are experiencing a lot of heat, it can make leaves droop and/or curl. Some strains can handle a lot of heat, while other strains tend to droop when it gets warm.

Heat can cause leaves to curl up

Read more about heat and growing weed:

• Cannabis Heat Stress Guide
• Air Circulation and Exhaust Tutorial
• 5 Ways to Deal with Heat While Growing Cannabis
• 3 Proven Supplements that Help with Heat Stress

Light Burn

Plants can get light burn (sort of like a sunburn) even if the temperature is completely under control. The symptoms are usually concentrated close to the grow lights. Sometimes this can cause leaves to claw and curl downwards.

Light burn can cause the leaves closest to the light to turn yellow

Learn more about light burn

Bugs & Pests

Often a bug infestation caused general plant unhappiness, but these are some of the most likely to cause curling or clawing leaves.

Broad Mites

Usually, you can’t see broad mites because they live inside the plant. The main symptom of an infestation is strange leaf curling that is specific to this pest, as well as “wet” looking leaves.

Hemp Russet Mites

Hemp russet mites can also cause drooping and other strange symptoms, but the bugs are so small many growers don’t realize what they’re dealing with.

Hemp russet mites cause drooping and yellow mold-like growth on the tops of plants

A closeup of the hemp russet mites

Learn how to get rid of hemp russet mites!

Fungus Gnats

Fungus gnats look like tiny flies buzzing around your topsoil. Although a few fungus gnats won’t really hurt your plants, a big infestation can damage the roots, causing symptoms similar to other types of root problems.

Learn about other types of bugs and pests that can attack your cannabis plants!

Jump to…

7 Step Fix to 99% of Cannabis Growing Problems

Pictures of Marijuana Plant Problems

What does pH have to do with nutrient deficiencies?

10-Step Quick Start Guide to Growing

The post Why are Leaves Curling or Clawing? (“The Claw”) appeared first on Grow Weed Easy.

Table of Contents

Why Flush Cannabis Plants in the First Place?

• Which growers should flush?
• How to prevent the need to flush

How to Flush a Sick Marijuana Plant (without harming it)

How to Fix Incorrect pH Without Flushing – Do this if possible!

Why Should I Flush My Sick Marijuana Plants?

The main reason to flush your sick cannabis plants is to try to correct something wrong at the roots. Flushing means watering your plants with lots of plain water at once. All that extra water leaches out extra nutrients or salt buildup in soil or coco coir. Flushing can also be used to address nutrient deficiencies caused by incorrect pH near the roots. However, flushing is stressful for plants, so it should be avoided unless you have no other choice. This tutorial will teach you when to flush your plants, and when you should address your sick cannabis plants a different way.

Flushing plants with lots of water makes them droopy, and should be avoided if possible. Take good care of plants and you’ll never need to flush. But when it comes to growing, things don’t always go according to plan! If that happens, this tutorial will guide you on what to do.

The following cannabis plants were flushed due to nutrient deficiencies.

When flushing is done properly, your cannabis plants should quickly bounce back and start growing healthy without deficiencies.

Related Article: How to Flush Cannabis Plants Before Harvest to Improve Bud Taste

The most common reasons to flush sicks plants are…

• Fix pH – The pH at the roots is several points too high or too low, causing major nutrient deficiencies
• Flush Out Additives That Made Plant Sick – It’s important to flush a plant that has been watered with something that has made it sick, for example if it is losing leaves because it was recently watered with a pesticide, nutrient or supplement that was too strong.
• Leach Out Time-Release Nutrients – If transplanting isn’t an option, sometimes a grower will flush a plant that is being grown in soil with “time release” nutrients (like Miracle-Gro soil). This idea is to try to leach out extra nutrients (specifically nitrogen) before the flowering stage begins. Too much nitrogen in the flowering stage can give buds a “green” taste as well as actually prevent buds from getting as big as they normally would. Since time-release soils slowly releases nitrogen for months it’s important to flush that out before your plant starts making buds.

If your cannabis plant gets sick the day after you add a new supplement for the first time, you should probably flush your plant to “start fresh” at the roots.

Which Growers Should Flush Their Plants?

Flushing sick plants is for…

• Soil
• Coco coir
• Other soilless mediums

Flushing sick plants is NOT for…

• Hydroponic or DWC grow setups – if you have a nutrient or pH problem, just change the reservoir so it has exactly what you want

How to Prevent the Need to Flush Your Plants

• Start Nutrients at 1/2 Strength – When using a new type of nutrients for your cannabis plants, it’s a good idea to start at 1/2 strength at first. It’s also a good idea to start any pesticides or supplements at half strength until you see how your plant reacts.
• Give More Nutrients to Pale Plants – Increase nutrient dose if the overall plant is starting to look pale or lime green.
• Lower Nutrients for Dark Leaves or Nutrient Burn – If you notice plants are getting dark green in color, try lowering nutrient levels or giving plain water every other watering until their color has improved. If you notice brown crispy tips on the leaves all over the plant, that’s another sign of the plant overall getting too much “stuff” (whether nutrients or supplements) in the water. If the dark leaves or brown tips are the result of too much nutrients, usually you’ll see these symptoms all over the plant instead of just a few leaves.
• Check pH for Other Nutrient Deficiencies – If you seen nutrient deficiencies like yellow leaves, spots, or brown markings, the first step is to check and adjust the pH of the water you give your plants. Maintaining the right pH is the #1 way to prevent nutrient deficiencies. Simply do this one check when you water, and you’ll dramatically reduce the chance you’ll even need to flush (pH being too high or too low is the main reason to flush plants). Learn more about nutrient deficiencies.
• Reduce Light Levels on Sick Plants – When plants are sick, try moving the grow light up a few inches or even a foot. This will help your plant recover more effectively from many nutrient problems, whether you end up flushing the plants or not.

Try to prevent nutrients problems before they happen so you never need to flush!

How to Flush Sick Cannabis Plants

1. Make up water with low levels of nutrients (1/4 strength or seedling dose). You want to take out the bad and replace with the good.
2. Give 3x the pot size – Use enough water so that you’re giving the plant 3x as much water as the volume of the pot. It may take a little while. Remove all runoff water immediately, you don’t want your plant to suck the bad stuff back up!
3. Give regular strength nutrients at the end – Make up one last batch of nutrient water at regular strength, and give this to your plants. You are replacing what you took out with what you want to be there – fresh, pH’ed nutrient water!
4. Make sure there is a fan blowing over the top of the growing medium to help it dry out so plants don’t get as droopy from being overwatered. There should be plenty of air circulation in the grow space, with access to lots of fresh air.
5. Raise your grow lights up a few inches while your plant is recovering. Your plant definitely needs plenty of light, but you don’t want to make it work too hard during the recovery period.
6. Wait a few days for improvement – Although your plant may get droopy at first, you should start to see improvement within a few days. Try not to water it again until the top inch is starting to dry. It’s not recommended to flush a plant two times in a row. After the first flush you should have flushed out what was hurting the plant in the soil. At this point, it’s time to give your plants some TLC while you get things back on track.

How to Fix Incorrect pH Without Flushing

1.) Determine your target pH

• Soil: 6-7 pH
• Coco: 5.5-6.5 pH

2.) Collect runoff

Give your water at the correct pH, and collect runoff water out the bottom. Is the pH too high or low? If the pH is higher or lower than the correct range, don’t panic! At the very least you’re already giving your water at the correct pH from on top. That will help the plant stay healthy while you fix whatever is going on at the roots. Now, onto fixing your pH.

3.) Start fixing the pH the next time you water your plants.

If you already have major nutrient problems, you might consider flushing as stated above. But if you don’t see problems yet, or if you only see just a little bit of leaf discoloration or yellowing, there’s no need to flush. Flushing is very stressful for plants and may prevent them from recovering as fast as they could, so it should be avoided if possible.

Most of the time, if your runoff pH was too high or too low, it’s better to wait until your next watering to start correcting it.

4.) Always give water in the correct pH range, but at the opposite end.

Next time you water your plants give water in the correct range, but at the opposite end of the range to start trying to get it to move in the other direction.

If your runoff water is coming out at 4.5 pH, it means you should water your plants at the high end of your desired pH range. So for soil you would water your plants at 7.0 pH, and with coco you’d water your plants at 6.5 pH.

This ensures that your roots are getting some amount of nutrient water at the correct pH, while also starting to leach out whatever is in the growing medium that’s dragging the pH down.

5.) When pH of water going in and out mostly match, you’re good!

Eventually, your pH is going to start coming out the bottom of the plant in the right pH range, even if it takes a few weeks.

Collect the runoff water and check to make sure the pH isn’t too high or low. Proper pH stops most nutrient deficiencies!

I’ve found that correcting the pH following this process seems to stop most nutrient problems within just a few days, while preventing your plant from getting stressed from a true “flush.”

—

I wish I had known this before I started growing. I’ve done too many unnecessary flushes and unintentionally stressed out my plants. I hope this help guides you to better results in your cannabis growing journey.

Happy growing!

Nebula Haze

Jump to…​

Diagnose My Sick Plants!

How To Get To Harvest As Fast As Possible

Where to Get Marijuana Seeds Online

The Perpetual Harvest

The post How to Flush a Sick Cannabis Plant appeared first on Grow Weed Easy.

Table of Contents

1. Supplements That Protect Against Heat Damage
2. Environment Hacks
3. Optimize Your Grow Light
4. Change Your Light Schedule
5. Heat Resistant Strains

Are your indoor cannabis plants stressed out by the heat? Controlling heat in the grow room is one aspect of growing marijuana indoors that can be difficult for many of us growers. Grow lights provide our plants with lots of life-giving light, but they also get hot, and big grow lights (even some LEDs) can raise the temperature of a room by several degrees.

Quick Heat Stress Tip: Of course, the best thing you can do is control the heat. But if that’s not possible, sea kelp extract can help cannabis plants deal with heat and quickly recover from heat stress (use at 1 tsp/gallon).

Each cannabis strain is a little different and some plants can handle hotter temperatures than others, but most plants start suffering from heat stress when their temperature gets over 85°F / 30°C.

Temperatures above 85°F / 30°C often causes problems, but if it’s not too severe plants may still grow slowly.

Some sensitive cannabis strains from cold climates (most often the short, squat, Indica strains with huge leaves) may start showing heat stress if the temperature rises above 80°F / 27°C. To avoid heat stress, you must keep your grow space below a particular plant’s comfort threshold.

Too much heat, especially over time, can greatly harm or even kill your cannabis plants.

But it’s not just plant growth that benefits from ideal temperatures. Controlling the temperature in the flowering stage has immense benefits to bud quality.

Buds that develop in a good environment reward you with increased density, terpene levels, and overall THC levels/potency.

On the flip side, too much heat harms bud development in the flowering stage by burning off smell/potency, discoloring buds, and causing buds to grow loose or airy.

Developing in heat can make buds look “ugly”.

Heat or light stress can cause a plant to keep making new growth on the parts of the buds that are closest to the light. When you see these top-heavy oddly-shaped “fist” buds, it’s usually the result of heat and/or light stress.

What can you do to protect your cannabis plants from heat damage?

This tutorial will teach you tactics that you can use to control temperature and fix heat problems to produce a plant paradise. You also get tips to help your cannabis plants thrive even if the grow space is getting too hot.

This tutorial shows you how to deal with heat so you grow healthy plants with beautiful potent top-shelf buds.

1.) Supplements That Protect Against Heat Damage

Some supplements can help protect your cannabis plants so they are more resistant and/or recover more quickly from heat stress.

However, many different companies offer supplements and it can be confusing to decide which one – if any – is best for your garden.

Try to get supplements and nutrients from the same company

For the most part, there is no best supplement for heat (or anything really). A lot of different supplements will get you to the same place in the end. Because of that, when possible it’s a good idea to choose supplements made by the same company as your nutrients instead of trying to find the “best” supplement.

This is because during the process of creating a complete nutrient lineup, nutrient companies specifically test their supplements to make sure they work together with the nutrients in their lineup nutrients without causing lockout or other unexpected problems.

So if you’re using the General Hydroponics Flora Trio nutrients, for example, it’s much safer for your plants to add supplements by General Hydroponics if possible. If you were using Botanicare nutrients you’d look at the supplements that Botanicare carries, etc. Learn about different types of nutrients for growing cannabis.

Use supplements to help protect your plants from heat damage if temperatures are rising too high

Seaweed Kelp Extract

One of the best inoculants against heat stress is a surprising gift from the ocean; seaweed! As a bonus it contains small amounts of trace nutrients and minerals. Many different nutrient companies use seaweed kelp extract as part of their supplement lineup, which means you have a lot of choices to choose from if you want to incorporate seaweed into your grow.

A few companies offer seaweed extract by itself, like organic Bloom City Liquid Seaweed. Liquid Kelp is a lovely choice for those growing outdoors or in super soil as they contribute to a healthy soil web matrix. Suitable for soil growers who want to avoid using mineral-based nutrients, but can also be used in coco or hydro (just make sure it doesn’t clog any nozzles).

Pure sea kelp extract is a great organic heat stress supplement. Use at 1 tsp/gallon.

If your nutrient company doesn’t offer a specific Sea Kelp product, you can almost always find sea kelp extract as an ingredient in one or many of their supplements. For example, General Hydroponics has a great all-in-one supplement called Floralicious Plus that contains several ingredients that work together to not only protect your plant against heat with seaweed extract, but can help it to produce better in other situations, too.

Or if you’re growing with Fox Farms nutrients, their Kelp Me Kelp You supplement not only has seaweed but also other ingredients that can make cannabis plants more hardy. So a great marijuana supplement for heat stress.

When starting out with supplements, it’s often best to start with something that matches your base nutrients and has sea kelp extract as an ingredient, like Floralicious Plus by General Hydroponics.

Silica Supplement

Supplementing your plants with extra silica (listed on the label of supplements as Potassium silicate) is not usually needed for healthy plant growth. There is almost always some amount of silica available, and plants don’t need a whole lot of silica to survive.

That means if your plants aren’t stricken with a (super rare) silica deficiency and are living in a great environment, adding extra silica might not give you tangible benefits. However, if your cannabis plants are under specific types of stress or are generally living in adverse conditions, extra silica can make life easier for your plant.

Silica (listed as Potassium silicate ) helps make plants more resistant to heat. Examples: General Hydroponics Armor Si and Dyna-Gro Pro-Tekt. It’s especially helpful to give extra Silica while your plants are still growing stems and leaves, as the silica gets incorporated into the cell walls.

The most popular silica supplement for marijuana plants may be Bloom City Silica Boost. (Use at 1 tsp/gallon, stop several weeks before harvest)

Plant roots with access to silica (Si) happily drink it up and the silica gets incorporated into plant cells, increasing the strength of individual cell walls. These “armored” cells help improve the hardiness, vigor, and structure of the plant. Kind of like sending your plants to the gym.

Benefits of Silica Supplements

• Plants supplemented with silica are generally more resistant to heat or cold stress as well as some types of disease.
• Silica increases the microscopic “abrasiveness” of leaves, which can act as a deterrent to pests and herbivores (like deer). In fact, if you’ve ever been given a paper cut by a piece of grass, you can thank silica for making those “sharp” edges.
• Silica helps plants get the nutrients they need. Silica is effective at making phosphorus more available to the plant, which can be helpful in the flowering stage when the plant is going through phosphorus at a much higher rate due to the process of making buds.
• Silica can also help the plant roots better absorb micronutrients (including boron, copper, iron, manganese and zinc) while making it harder for the plant to absorb certain toxic substances like aluminum and salt/sodium.

So again, silica won’t magically increase your plant growth, but it can help make up for some problems with the environment. Because of this, nearly all professional nutrient companies carry a quality silica supplement as part of their lineup.

I like Armor Si by General Hydroponics, but again that’s because they make my base nutrients. There is a silica supplement available from almost every major nutrient company out there and you’re least likely to run into problems if you go with the company that matches your nutrients.

Armor Si by General Hydroponics is an excellent silica supplement, especially if the rest of your nutrients are from General Hydroponics.

Note: Silica supplements (or more specifically, their main ingredient Potassium silicate) will raise the pH of your water, so you may need to use a little bit extra PH Down. Learn more about pH.

Root Health Supplement (Essential for Hydroponic Growing in Heat)

Not only does heat bother your plants above ground, but the roots may also become diseased. When growing cannabis hydroponically (and to a lesser extent when growing in soil or coco) it’s very easy for your roots to start running into problems like root rot when the temperature starts getting too high.

Cannabis plants in hydroponic systems are prone to root rot if you don’t give them a root supplement. Especially if it’s hot!

Full Tutorial – How to Get Rid of Root Rot

The types of microorganisms that attack roots thrive in hot, wet conditions without much oxygen. Unfortunately, in hydroponics your water can’t hold as much dissolved oxygen when it’s hot, and dissolved oxygen is one of the best ways to fight off root disease.

So it’s sort of a double-whammy for plants grown hydroponically when it gets too hot in the grow room: they’re getting less oxygen AND becoming more vulnerable to root rot.

Besides using an air pump with large air stones to create lots of bubbles in your reservoir (learn more about growing cannabis hydroponically), the best thing you can do to keep roots healthy is control the heat.

Unfortunately, as you know, controlling the heat is often easier said than done.

There are some products that are made up of beneficial bacteria and other microorganisms that specifically fight root rot. These work by out-competing the bad microorganisms in your water reservoir and populating your reservoir with friendly ones that actually help your roots.

Drooping is often the first sign your plants are suffering from root rot

Plants with root rot may also start getting what looks like various nutrient deficiencies, but the true cause is actually the unhealthy roots

My product of choice for fighting root rot is Hydroguard by Botanicare. Normally I only use nutrients and supplements by General Hydroponics but in my experience, this product has been the best for fighting root rot in DWC / hydro, so I use it specifically. I’m definitely not saying it’s the best root supplement out there, but it’s the best one I’ve ever used and I want to recommend something I know for sure will work. It doesn’t change the pH of the water, and it doesn’t interact with other supplements. I’ve seen it actually fight root rot directly, even when it’s hot, and I never go a grow without it.

I highly recommend Hydroguard as a root supplement for any hydroponic grower struggling with heat or root rot

I’ll be honest, I grow hydroponically in San Diego, and my grow room is too hot during the summer. I used to suffer from root rot but as long as I use 1 teaspoon per gallon of this supplement in my reservoir, I see white, healthy roots even in the heat.

I realize this isn’t a direct method to combat heat; rather, it’s a way to help deal with the consequences of too-high heat when it can’t be controlled. It’s best to control the heat in your grow area, but if that’s impossible Hydroguard will help keep your roots healthy in DWC / Hydro! It’s cheap and a little bit goes a long way. A 1-quart bottle will last you more than one grow!

2.) Environment Hacks

Add CO2 to the Air

Plants can easily survive in temps up to 95°F (35°C) when the air is being supplemented with extra CO2. However, for CO2 to make a difference to your plants, you need relatively strong grow lights (i.e. HPS, LEC, or big LEDs). But for those with strong grow lights, adding extra CO2 can result in faster growth as well as making it so plants can better handle the heat.

Learn how to add CO2 to your grow

Choose Soil or Coco (Hand-Watered Grow) Over DWC/Hydro

Growing cannabis hydroponically can give you some of the fastest growth rates of any style of growing, but as mentioned earlier, hydro does not really play well with hot temperatures because too much heat tends to trigger root problems and slower growth.

We talked about supplements that help prevent root rot for hydroponic plants, but the next step is to cut out the water reservoir altogether and go for a hand-watered grow. That’s because hand-watered plants are inherently much more resistant to high temperatures. Not only are the roots relatively safe from the heat (unlike in hydro) but the growing medium can hold a lot of oxygen no matter what the temperature (a lack of oxygen at the roots causes major problems in hydro).

Plants grown in containers or in the ground tend to be more resistant to heat compared to hydro.

Soil in regular containers is probably the most common way to grow cannabis indoors, and that combo works great.

But when it comes to growing in hot temps, coco coir may be a better choice than soil. In particular, coco coir inherently has properties and hormones that encourage healthy root growth and promote hardiness against heat.

Soil is a good choice, but coco coir is even better when it comes to heat.

Use Smart Pots or Air Pots (instead of hard-sided pots) 

Choose a Smart Pot (fabric pot) or Air Pruning Pot (plastic pot covered in holes) to let air in and help cannabis plants with the heat. These pots help increase evaporation from the sides of the root ball, which not only reduces the chance of overwatering but also helps keep roots healthy and heat-resistant by providing plenty of oxygen from the sides.

Use Smart Pots (fabric pots) instead of regular containers as further protection against heat. These coco-grown plants were regularly exposed to temps that crept up over 85°F (30°C), and although that wasn’t ideal they made it to harvest just fine.

Air pruning pots are plastic but have holes in the sides, which accomplishes the same thing as fabric pots (gets more air to the roots) and makes them more heat-resistant.

Growing cannabis with coco coir in fabric pots is one of the best ways to grow if you want your plants to be able to resist the heat.

Keep Roots Cool

Your plant is much more resistant to heat if the roots don’t cook too, whether you’re growing in a pot or in a hydroponic reservoir. If you can find a way to help keep the roots around 70°F (21°C), your plant will suffer less and recover more quickly from a hot spell.

Watering your plant regularly when it’s hot will keep roots from drying out and help them stay cool. If the sides of the pots are getting hot from the grow light, put your potted plant inside a bigger pot (or find some other way to block the pot from direct light. This can help keep roots significantly cooler.

If the sides of pots are getting hot from the light, put the whole plant in a bigger pot to create an air gap and keep the roots out of direct light

Use Fan Placement to Reduce Electricity & Bring Down Temps

Air conditioners can easily control the heat in any room but they use a lot of electricity, which can get expensive really fast! Unfortunately, a lot of growers are using an AC (or just dealing with too much heat) when they could actually reconfigure their fans to be able to maintain the right temps without needing an AC at all.

Proper fan placement can also help save costs because if you use fans more effectively you can use less of them. A lot of fans can use a surprising amount of energy that can really add up over time. That means you don’t want to fill your grow space with tons of fans if you don’t need to.

Being smart about fan placement and investing in electrically efficient fans can save you a lot of money. 

Exhaust Fans

The most effective way to control heat is to use an exhaust fan to vent hot air out of the grow space. Make sure your exhaust fan is set up to make sure you have the most cooling power. Here are some tips:

• Grow space is mostly sealed – Your grow space should be mostly sealed for an effective exhaust system, with just ports for air to come in near the bottom of the grow space, and a port for your exhaust fan to blow air out from near the top of the grow space. I highly recommend getting a grow tent for smaller grows to make this super cheap and easy. A grow tent with a strong exhaust fan creates a breezy plant environment that may not even need many other fans. As an added bonus, a grow tent makes it easy to control smells with a carbon filter so no one can smell your plants even in the same room.
• Strong exhaust fan – Your exhaust fan should be strong enough for the size of your space or tent. Avoid cheap ducting fans as they don’t move enough air to cool your grow light. Learn more about choosing the right exhaust fan.
• Vent air from top of grow space – Heat rises to the top of your grow tent/area, so make sure your exhaust fan is located at the top of the tent pointing out.
• Intake holes – You want holes to intake air, about 4x the size of your exhaust hole if possible. When the intake hole is too small it’s hard on your fan, the exhaust won’t be able to vent as much hot air. With grow tents, the intake ports are already built-in so you just leave them open so air can get through.
• Input fresh, cool air – The intake hole should have direct access to cool, fresh air. The inside of the grow space is always going to be at least a few degrees above the temperature of the intake air, so if the intake air isn’t cool the grow space will be even hotter. Cool air stays lower to the ground, so make sure your intake ports are as close to the floor as possible.

Learn more about setting up exhaust system.

Ducting

Keep all ducting as straight and short as possible. You want a short direct line to the window so that hot air is immediately vented outside. Try to avoid using anything in the window that restricts airflow. Though it’s often necessary to use some type of screen to make sure no one can see in, try to do the best you can to obstruct airflow as little as possible. How can I set up an exhaust that looks normal from outside?

Try to keep any ducting as short and straight as possible.

Window Fan

It may seem simple, but a window fan can be surprisingly effective at venting some of the heat if the grow light is raising the overall temperature of your room. In some cases, a window fan can cool your room by several degrees, which can help keep your plants cool. I sometimes call this a “No-Ducting Exhaust” but honestly it’s more like a ‘poor man’s exhaust’ if this is the only thing you’re doing to vent out heat. But that doesn’t mean it doesn’t help,

If grow lights are raising the temperature of your room, a window fan can help vent heat and cool the room down by a few degrees

In order for a window fan to cool a room most effectively, there needs to be some sort of “intake” for cool air to get in. It’s like a bigger version of an exhaust system. A separate open window in the same room is perfect, though an open door can also help, especially if there’s an open window somewhere in the house. However, even in a completely closed room, a window fan can help keep temps down somewhat in the room because it helps vent out heat from the grow light. Although blowing air out is often the most effective, if the air outside is really cool sometimes it helps to blow air in. Experimentation is good.

Clip-On Fans

Small fans help ensure there is a gentle breeze around your plants and buds. This helps plants grow faster, helps buds develop more dense/tight, and reduces the chance of issues like white powdery mildew or bud rot.

Some specialty clip-on-fans are designed specifically to attach to the poles of a grow tent.

Oscillating Fans

Oscillating fans are perfect for reducing “hot spots” that form in the grow space. Certain grow lights can cause major hot spots. If it’s most hot directly under the light, using fans to blow that heat away from your plants can make a huge difference in how much heat they experience.

In addition to oscillating fans, using a strong-enough exhaust fan with a big intake hole helps keep everything moving so hot spots don’t form. In fact, a smallish grow tent with a good exhaust fan may not even need extra fans because the exhaust fan itself will make the entire tent breezy.

Just be aware that adding oscillating fans doesn’t bring down the overall temperature in the tent. Fans only move air around. So if the entire grow space is already hot, adding more fans isn’t going to help.

Learn more about how to effectively set up oscillating fans in the grow room.

3.) Optimize Your Grow Light 

There are several ways you can optimize your grow lights, up to and including upgrading to better ones.

Get the Right Size Grow Light (a smaller grow light doesn’t necessarily mean lower yields!)

Grow lights that are optimized for your size grow space tend to reduce problems with heat. Too much heat hurts yields by making plants grow poorly. On top of that, too much light (light stress) can prevent buds from fattening and make plants more sensitive to heat.  That means having the right size light for your space will help prevent the space from overheating. When buying a grow light, many manufacturers list which size space the particular grow light is optimized for (aka 2’x4′ or 4’x4′). Try to match the right size grow light to your space.

In some cases, getting a smaller light can actually increase yields, especially if the heat is out of control with your current light.

 If you’re struggling with heat and plants are constantly heat stressed, consider stepping down the light. These plants grew better after the grower turned down the power.

These plants were also getting way too hot. The grower started getting better yields when they took one of the LED panels out of the space.

Side note: I’ve found that older and “blurple” colored LED lights tend to put out far more heat than modern LED panels. Buds also don’t fatten as well under them.

Avoid blurple LEDs for growing weed!

Use an LED Grow Light

When it comes to heat control, LEDs are hands-down the best cannabis grow light. As of 2025, multiple newer LED grow lights have proven to be incredible at growing cannabis. These modern LEDs have been developed using real cannabis plants and live up to the LED hype, producing amazing yields and beautiful bud quality.

In my experience, nearly all newer LEDs run cooler per watt than other grow lights like HPS, or CMH/LEC.

On top of the fact that LEDs produce less heat compared to other lights, cannabis plants under LEDs typically can stand higher temperatures. So LEDs give you a light that puts off less heat and plants that can stand more heat. If heat is a concern, you want to go with LEDs.

Note: LEDs perform poorly in the cold. If you deal with cold in the grow space, HPS or CMH/LEC may be a better choice since they produce more heat and plants can stand cooler temperatures under them.

There are a lot of LEDs to choose from and the sheer number of options can be overwhelming. If you’re interested in getting your first LED and aren’t sure which one to get, Spider Farmer brand LEDs are a good mix of quality and price. They get a good rate of growth in the vegetative stage and better yields/bud quality than many LEDs in the same price range. I recommend avoiding generic LEDs (like you would buy from Alibaba) because they usually get hotter than expected for the wattage and often produce poor yields or bud quality.

The Spider Farmer SF-2000 LED grow light uses 200W of electricity and produces relatively little heat.

In my most recent grow, the Spider Farmer SF-2000 produced over 10 oz in a 2’x4′ grow tent, or over 1.5 grams/watt. The plants grew quickly and well. I got the buds lab tested and it produced more terpenes and THC than the other LEDs I tested at the same time. A great choice for under $200.

My friend used the Spider Farmer SF-1000 (100W and costs $90) in a 2’x2′ grow tent and produced several ounces. This light can be kept 8″ (20 cm) away or even closer for some plants, which makes it effective for small spaces.

Learn about other popular LED companies for growing cannabis.

Reduce Power

Many LEDs and other types of grow lights are “dimmable” which means they have different power settings that allow you to reduce the power of your light. For example, you might be able to set your grow light to 75% or 50% power. In these modes, your grow light will use less power and give off less light/heat. If there’s a heat wave coming up, it might be helpful to turn down the power until things cool down.

Raise Grow Lights

Raising your lights tends to help bring down the temperature experienced by the plants, especially with big fluorescent lights, CMH/LEC, and MH/HPS grow lights. Getting a lot of light can make plants more likely to suffer from heat, so another bonus of moving your lights further away can help them be more heat-resistant.

Note: If I need to raise my grow light higher than the normal hanger allows, I use zip ties to attach the grow light to the top of the tent. However, make sure to leave at least a little air gap so you don’t have a hot lamp touching the top surface of the tent directly (this can be a fire hazard).

Raise grow lights (if possible) when the plants are getting too hot to help reduce the heat they experience and especially reduce heat on developing buds. Sometimes a few inches can make a difference.

Learn more about how far away to keep grow lights from your plants.

4.) Change Your Light Schedule

Opt for 18/6 Light Schedule in the Vegetative Stage

Many growers give their plants 24 hours of light a day in the vegetative stage to produce the fastest growth. Yet turning the grow light off for several hours each day helps keep the temperature down, especially if lights go off during the hottest part of the day. The 18/6 light schedule is suitable for all plants in the vegetative stage, and for auto-flowering strains from seed to harvest.

Plug your grow light in an electrical timer to control the light schedule

Side Note: Although plants do grow faster if they’re getting 24 hours of light a day, you get diminishing returns after 18 hours of light a day. Cannabis plants benefit from having a night stage, and that helps make up for the lack of extra light. The difference in growth between 18/6 and 24/0 isn’t very noticeable (the increase in growth may not justify the extra electricity and heat).

Learn more about cannabis light schedules here.

Set Your Dark Period for the Hottest Part of the Day

This is a super simple solution to help control the heat for growers who get high temperatures in the middle of the day. User your timer to set your “Off” time to happen during the hottest hours of the day and you’re done. As long as you make sure plants don’t get light during their dark period, they won’t realize their “day” is during your night.

5.) Start with a Heat-Resistant Strain

Some strains are inherently more resistant to heat than others. For example, strains that originated from the equatorial region, including many Sativa and Haze strains, can resist much higher temperatures than strains that originated in colder regions, such as many Indica strains.

• Tall strains with thin leaves tend to be relatively heat-resistant
• Short, bushy strains with fat leaves tend to be more sensitive to heat
• Check the strain description to see if it mentions anything about temperature

Here are some strains that are heat resistant, easy to grow, and produce great effects.

Photoperiod (Traditional) Strains

White Widow

• Legendary strain
• Buds produce smooth relaxing effects that are great for enjoying with friends
• Overall easy-to-grow and resistant to heat and mold
• Has a surprisingly short flowering stage (8-9 weeks) for a Sativa-dominant strain, and doesn’t get too tall
• Great yields even if you mess up a little
• Get White Widow from Seed Supreme (ships from USA)

White Widow is a legend!

Purple Thai

• Thrives in higher heat and humidity than most strains
• Grows tall and stretchy so you need to train the plant to reduce the height (or it may grow into your light)
• Pretty potent at 22% THC but still more of a “head high” (it may even be suitable for day use for high-tolerance people)
• Get Purple Thai from Seed Supreme

Purple Thai laughs in the face of heat!

Afghan

• In addition to doing well in the heat, this strain is overall easy-to-grow and resistant to pests and mold
• Buds produce very heavy effects (a “brain melter”)
• Great yields and bud quality
• Get these Afghan genetics.

This Afghan plant thrived in burning hot temperatures during a heat wave.

Sour Diesel

• Withstands heat and light better than most strains I’ve grown
• Strong fast plants that tend to be stretchy/tall (not the best choice for small spaces)
• Buds are consistently potent and high quality
• Takes 12 weeks in the flowering stage but rewards with huge yields
• Get these Sour Diesel genetics.

Sour Diesel is the plant on the left. It produced over 9 ounces on one plant.

This bud from that Sour Diesel plant grew within 8″ (20cm) of a 600W grow light in the middle of a heatwave. The plant on the right suffered tons of damage despite being further away. On the other hand, the Sour Diesel buds came out huge and potent with a little heat foxtailing on top buds that were closest to the grow light.

Auto-Flowering Strains

The Ruderalis hemp ancestor of all auto-flowering strains originated in the frigid cold climate of northern Siberia. These plant’s developed the auto-flowering trait so they could complete their whole life cycle during 2-month Arctic summer. Unlike photoperiod plants, these plants didn’t have the luxury to wait until the sun told them winter was coming. They had to complete their whole life as fast as possible. As a result of the cold climate of their ancestors, auto-flowering strains tend to be sensitive to heat. However, some breeders have bred out the trait by crossing with heat-tolerant strains. The following is an example of a heat-resistant auto-flowering strain that also produces great buds.

Amnesia Kush Auto

• Gets a bit tall, but usually not too bad since it’s an autoflowering strain
• Excellent “day” buds with a pleasant mental buzz
• Get Amnesia Kush Auto from Seed Supreme (ships from USA)

Get Amnesia Kush Auto for your garden!

Auto Blackberry Kush

• Beginner-friendly
• Resistant to heat as well as plant stress in general
• Incredible fruity smell
• “Body stone” that keeps you glued to the couch
• Get these Auto Blackberry Kush genetics.

An Auto Blackberry Kush plant in a DIY setup

Dos Si Dos Auto

• Easy to grow (can handle some mistakes)
• Smooth, relaxing effects
• Above-average yields
• Buds smell of citrus with hints of cake or cookies
• Get these Dos Si Dos Auto genetics

Dos Si Dos auto by Barney’s Farm is known for its yields, bud quality, and fast growth.

If you have experience with a great heat-resistant cannabis strain, please contact us!

Most importantly, take extra good care of heat-stressed plants – try to baby them as best you can!

Jump to…

Growing Cannabis with Super Soil

How to Use Coco Coir as a Growing Medium

Top-Fed DWC (Bubbleponics) Tutorial

How do I produce top-shelf buds every time?

Where can I get seeds?

The post 5 Secrets to Controlling Heat Indoors appeared first on Grow Weed Easy.

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

• Complete Beginner’s Guide
• How do I start growing my own weed indoors? (get help choosing your setup)
• How to Grow Weed in 10 Steps
• Simplest Cannabis Grow Guide Ever!
• How Long Does It Take to Grow Weed? (Marijuana Growth Timeline)
• 3 Steps from Beginner to Legendary Grower
• Complete New Grower’s Shopping List

Cannabis Life Stages

• Germination
• Vegetative Stage (Getting Bigger)
• Flowering Stage (Making Buds)
• Harvest

Choosing…

• Best Type of Nutrients
• Choosing the Best Grow Light
• Soil vs Hydro
• How Many Plants Should I Grow?
• What Part of the House Should I Grow In?
• What Setup Should I Get?
• Best Strains for Beginners
• Where to Get Seeds (including the U.S.)

Common New Grower Topics

• How Much Will Electricity Cost?
• Stealth Growing: How NOT to Get Caught Growing Weed
• What Equipment Do I Need?
• Germinate Your Seeds
• 7 Things I Wish Someone Had Told Me When I First Started Growing Weed
• How to Save Money When Growing Weed
• How to Store Weed Properly (so it never loses smell or potency!)
• Ask Questions & Get Answers From Real Growers! (In Our Free Growing Community)
• Cannabis Grower’s Glossary

Problems & Symptoms

• Cannabis Problems Guide
  • How to Help Yellow Seedlings
  • How to Fix Yellow Cannabis Leaves
  • How to Fix Curling and Clawing Cannabis Leaves
  • What Causes Dry or Crispy Leaves?
  • What Causes Brown Spots on Cannabis Leaves?
  • What Causes Bananas (“Nanners”) on Cannabis Buds?
  • Is This Nutrient Burn on My Marijuana Plant?
  • What causes red stems in cannabis plants?
• Diagnose Your Sick Plant
• Bugs & Other Cannabis Pests
• How to Prevent Nutrient Deficiencies
  • Which Nutrient Deficiencies are Caused by pH? (picture guide)
  • How to Stop Flowering Stage Nutrient Deficiencies
• 7 Reasons Why Cannabis Plants Grow Slow
• 5-Step Remedy That Fixes 99% of Grow Problems
• All-Natural Pesticides – Safe Up to Harvest!

Plant Training (Indoor Tricks for Bigger Yields)

• Simplest Plant Training Guide Ever!
• How to Control Height of Indoor Cannabis Plants
• Complete Plant Training Guide
• Breakdown of Techniques​
  • Low Stress Training (LST) Tutorial
  • Topping vs FIMing Tutorial
  • LBH’s Famous ScrOG Tutorial
  • Supercropping: Magic Technique to Control Cannabis Plant Height
  • Sea of Green (SoG) Tutorial
  • 12-12 from Seed – Flowering Plants Early
  • Nebula’s Manifold Tutorial
  • How to Manifold Clones
  • Nebula’s Bud-Based Defoliation Tutorial
  • Alternate Defoliation Tutorial ​
  • What is Re-Vegging / Monstercropping?
• How Can I Train an Auto-Flowering Plant?
• 7 Unfortunate Plant Training Mistakes

Grow Mediums

• What’s the Best Growing Medium?
• Soil vs Coco vs Hydro
• Basic Soil Guide
• Organic Soil Compost Guide (Super Soil) – Just Add Water!
• Coco Coir Guide
  • Coco Coir: The Most Flexible Cannabis Grow Medium
• Hydro/DWC/Bubbleponics Guide
• “True” Organic Growing vs Just Using Organic Nutrients
• Can You Use Miracle-Gro?

Nutrients

• Which Nutrients Are Best For Growing Cannabis?
• Soil Nutrients
• Coco Coir Nutrients
• Hydroponic Nutrients

Grow Lights

• 5 Best LED Grow Lights 2025 (Yields, Speed, & Bud Quality)
• Compare Types of Cannabis Grow Lights
  • Fluorescents (T5s) – Good for Seedlings Only (not powerful enough to produce potent buds or big yields)
  • CFLs (Spiral Bulbs) – Not Recommended (LEDs are much better)
  • LED Grow Lights – Recommended for Most Home Growers
  • MH/HPS Grow Lights – Good Alternative to LEDs, But Run Much Hotter
  • CMH / LEC Grow Lights – Good Alternative to LEDs, But Run Much Hotter
  • Plasma / Magnetic Induction Grow Lights – Not Recommended (poor cannabis growth)
• How Does Light Spectrum Affect Marijuana Plants?
• How Far Away Do I Keep My Grow Lights?
• You Can Actually Give Plants Too Much Light?!
• Grow Light Upgrade Guide: Yields & Potency Explained
• Cannabis Grow Lights: What’s the Best Size?

Best LED Grow Light Articles

• 5 Best LED Grow Lights 2025 (Yields, Speed, & Bud Quality)
• LED Grow Lights: Too Much or Not Enough Light?
• LED Grow Journal: Mars Hydro TSL-2000W vs Spider Farmer SF-2000
• LEC vs LED Grow Lights: Side-by-Side Cannabis Grow Journal
• Nebula’s Auto-Flowering Grow Journal (Topping vs Natural) – cannabis plants are grown under LED grow 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 Make Plants Grow Faster with CO2
• Where’s the Best Place in the House to Grow Your Plants?
• How to Control Odors
• How to Set Up an Exhaust
• How to Set Up a Grow Tent for Better Yields (and Stealth)

Plant Care Tutorials

• Cloning
  • How to clone weed in a cup of water (easy!)
  • How to make cannabis clones with an aero cloner
• Intro to Plant Training for Bigger Yields Indoors
• How Often to Water Plants
  • The Easiest Way to Water Plants & Remove Runoff
• How (and When) to Transplant Cannabis
• Male vs Female Plants
• When to Harvest?
• Drying & Curing

How to Improve…

• Yields
• Bud Quality
  • 7 Environment Effects on Bud Quality
  • The Secret to Excellent Bud Quality
• THC Levels
• CBD Levels
• Smell/Taste
• Density
• Bud Color (How to Grow Pink or Purple Buds)
• Glitter (Make Buds Sparkle with More Trichomes)
• Bonus: What Determines Yields?

Buying Seeds

• Where to Get Seeds
• How to Find the Right Strain
• What are “Feminized” Seeds?
• Which Breeders to Trust?
• Photoperiod vs Auto-Flowering Cannabis Strains
• Bag Seed vs Hype Seed: Is it worth it to buy cannabis seeds?

Recommended Strains

• Best Autoflowering Cannabis Strains for Yields & Potency
• List of Sugar-Dusted Strains (Heavy Trichome Genetics)
• 10 Cold-Resistant Cannabis Strains
• 14 Heat-Resistant Cannabis Strains
• Which cannabis strains stay short? (Best strains for small spaces)

Auto-Flowering Strains

• Nebula’s Guide to Cannabis Auto-Flowering Strains (Photoperiod vs Auto-Flowering)
• Should I “Top” or Train an Auto-Flowering Plant?
• What’s the best light schedule for auto-flowering strains?
• Nebula’s Auto-Flowering Grow Journal (Topping vs Natural)

Edibles

• Decarboxylation: How to Decarb Your Weed (crucial step for just about every edible recipe)
• Best Weed Butter Recipe
  • How to Make Great Brownies with Weed Butter
• Canna Caps
• How to Make Cannabis Gummies (Weed Gummy Bears)
• How to Make Cannabis Tinctures
• How to Make Hash Oil (aka Cannabis Extract Oil, Rick Simpson Oil, or RSO)

Extracts (No Solvents Used in Any Recipe)

• Solventless Extraction Showdown – Bubble Hash vs. Dry-Ice Hash!
• Dry Ice Hash (Made with Dry Ice)
• How to Make Bubble Hash (Made with Ice Water)
• How To Make Your Own Homemade Rosin (dabs)

And Lots More!

• How Long Does it Take to Grow Weed?
• Vegetative vs Flowering Stage (Long Days vs Long Nights)
• Germination & Seedling Mistakes
• Simple Guide to Plant Training
• What’s the Best Pot / Container?
• Perpetual Harvest
• What Determines Yields?
• 5 Time-Savers for Busy Growers
• Breeding Techniques
• 7 Gift Ideas for Cannabis Growers
• Grow Journals
• How long can I store nutrient water?
• What is High-Frequency Fertigation?
• Where is it legal to grow weed in the USA?
• See EVERYTHING on the Site!

Safety & Preparation

• Fire Protection in the Grow Room
• Electrical Safety Tips & Tricks
• Prepare Yourself for Growing Emergencies
• Stealth Growing Indoors: How to NOT get Caught Growing Weed

Just for Fun

• Weird or What? Cannabis Mutations & More!
• Creatures on Cannabis (Cute Photo Gallery)
• 10 Gift Ideas for Cannabis Growers

Submit Pics

• Submit Trophy Pictures of your Plants!
• How to Take Better Plant Pics
• How to Fix Yellow HPS Pics

Want More?

• Complete List of EVERYTHING on GWE  ← Full List (Over 500 articles & growing!)

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, or click here to see every single page on the website!

The post Link Guide to Growing Cannabis Tutorials appeared first on Grow Weed Easy.

In this article, I will share how we were able to remedy a case of cannabis root rot in a hydroponic setup. Root rot is often thought of as being "incurable" and I've heard of several cases where growers throw away their cannabis plants that are hit by root rot. I know lots of growers who have tried hydroponic growing, and gave up after running into root rot for the first time.

I have to admit, I've actually thrown a growing cannabis plant away because of root rot – it was several years ago during my first ever try with hydro. I thought I'd tried everything to kill the root rot pathogen, including SM-90 and Hydrogen peroxide (H2O2), When the plant wasn't recovering, I simply trashed it. Looking back now, I see that I could have easily saved that plant.

The real trick to getting rid of root rot is figuring out why it's attacking your cannabis in the first place. Once you know the root cause, fix that first! After that, you can use root supplements to help your cannabis plant recover from root rot as fast as possible.

Cannabis root rot isn't that difficult to cure if you have the right information. Let me share a story about root rot which was able to be fixed in just a few days. This allowed the plants to continue growing on until harvest. This method should also work for you if you're experiencing cannabis root rot in your hydroponic system.

Uh oh….

Heat problems!

We were struck by an intense heat wave during the middle of this grow. While we do have a very powerful exhaust fan to pull heat out of the tent and through a window, the temperature outside climbed above 100ºF (or 38ºC – unusually hot for where we live), and since we had no AC at the time, the temperature of the entire house was extremely high. Even though the fan was pulling hot air out of the tent, there wasn't really much cool air to replace it in the tent.

The temperature of the grow tent climbed to the 90s ºF (mid-30s ºC), which is far too hot for a grow tent, especially with a hydroponic setup. In this type of setup, it is recommended the grow area is kept at a comfortable room temperature (around 70ºF) for best plant growth.

In the reservoirs, we could see the plant roots showing signs of root rot.

Root rot 🙁

One of our plants was affected only slightly (her roots had slight patches of brown, but she didn't really show any signs of stress above ground). However, the other plant in the tent was struck much worse. She had recently been transplanted into a bigger container, and we suspect that moving her to a new reservoir may have stressed her out slightly, leaving her less resistant to root rot than her sister who wasn't moved at all.

Here is what she looked like on top (the more damaged plant right after she was struck by root rot):

Root rot is a condition that affects the roots of many plants including cannabis, most commonly in hydroponic setups when the plant is not getting enough oxygen to the roots.

When the heat rises, the water in the hydroponic reservoir physically cannot "hold onto" as much dissolved oxygen, and the plant roots can more easily become starved for oxygen.

A lack of oxygen at the roots (in this case caused by the hot temperatures) leaves plant roots susceptible to a type of bad bacteria that causing browning of the roots which is commonly known as root rot. A plant that is struck by root rot will wilt and show major signs of stress and problems with their leaves.

How did we beat the root rot?

We took a 3-step approach to beating root rot:

1. Reduce heat (high temperature is often a huge contributor to root rot)
2. Deliver more oxygen to roots (root rot has difficulty surviving in high oxygen environments)
3. Add "good" bacteria to out-compete root rot (certain bacteria is beneficial to your root health, and will help your plants overcome and be protected from root rot)

1.) Reduce heat

During the heat wave, we changed from a 24 hour light schedule to a 18-6 light schedule to help reduce the heat (18 hours of light, and 6 hours of darkness). This light schedule is still suitable for the cannabis vegetative stage, but allowed us to use a timer to turn off the light during the 6 hottest hours of the day. This caused the average temperature of the grow tent to drop dramatically.

While vegetative growth is slower on an 18-6 schedule than a 24 hour one, we decided to keep the 18-6 vegetative light schedule for the rest of the summer just in case we had any more heat waves.

2.) Deliver more oxygen to roots

One way we increased the amount of dissolved oxygen available to the roots (to help fight the root rot) was to lower the temperature of the grow room and therefore the reservoir, because water can naturally hold more oxygen at cooler temps.

We lowered the level of the reservoir water by several inches to leave a misty air gap of several inches to feed oxygen directly to the roots, similar to an aeroponic setup. Because of the roiling water below, the air in the tub remains at nearly 100% humidity, with plenty of oxygen to help the roots fight off root rot.

3.) Add good bacteria to fight root rot

Last, we drained the reservoir, then we mixed new nutrient water with a huge healthy dose of Aquashield (a source of beneficial root bacteria, which is a staple in our hydroponic grow room).

The combination of changing the light schedule to reduce the heat, the addition of an air gap by reducing the amount of water in the reservoir, and the addition of Aquashield did the trick.

What we didn't do: We did not add additional airstones or a stronger pump to increase the dissolved oxygen in the reservoir because we already have 2 large airstones and a relatively powerful pump. A grower could put a more powerful air pump to increase the number of bubbles in the reservoir which would help fight against root rot, but in our stealth setup, a bigger air pump would be a bit too loud. We also could have added an expensive water chiller to keep our reservoir cold, but since we have never encountered this problem before we decided that would be a waste.

3 days later – New healthy roots began to grow out of old brown ones

New roots started growing pretty much immediately and both plants slowly recovered, though the rot killed several leaves & slowed down growth for about a week.

One of the things I've learned is that every grow has it's own unique challenges. Every time you run into a problem, the best thing to do is learn from your mistakes and use that information to do even better in your next grow.

The plants recovered from the root rot, and the grow continued on without a hitch until harvest.

Jump to…

Learn about cannabis & root rot

Other cannabis root problems

Soil or Hydro?

How to grow hydroponic cannabis

The post Case Study: Root Rot Recovery appeared first on Grow Weed Easy.

Here's a series of pictures of a couple marijuana clones I had a few years ago.

I was experimenting with growing an entire plant from clone to harvest in a solo cup, which is why you can see flowering plants in such small containers. Each of these were flowered as soon as the clones took root. This technique is often called "Flowering from seed" or "12-12 from seed" and just means that you force the plant to start flowering at a very young age. I wanted to see how small I could get flowering plants.

Each clone was give the exact same nutrients, conditions, etc. They were green and healthy when I left for a 3-day trip.

Situation: I was leaving for 3 days, and these flowering marijuana clones needed to be watered almost daily since their containers were so small.

In an attempt to give them enough water to last the trip, I over watered them before I left.

When I got back, the plants looked like they had practically died!

Look at how different all of the symptoms were with each of these plants, when the problem was actually the same for all of them:

Same Underlying Problem For Each of These Clones

• Overwatered
• Kept in a grow room that was way too hot (it got up over 100 degrees while I was out of town, and they were kept in these temps for 2-3 days)
• Too small container for their roots (with bigger root mass, marijuana plants are much more resilient to problems)

(remember, these clones were ALL green and healthy before I left, so I feel certain these problems were all caused by the reasons stated above)

Resulting Symptoms Varied Greatly

Clone 1: leaves yellowing and curling up like elf feet, tip burn

Clone 2: curling, rusty brown edges and brown spots

Clone 3: Gets a different type of rusty brown spots

Clone 4: Lime color and curling upwards towards the top of the plant, and yet another type of rusty brown spots and yellowing / curling towards the bottom (looks like a nitrogen deficiency on bottom)

Clone 5: brown spots on top, taco leaves, browning, curling of lower leaves, like a phosphorus deficiency (this is the only clone the appears to have what looked like a phosphorus deficieny in the lower leaves)

Clone 6: rusty outer edges, brown spotting

The truth is, when the marijuana plant's roots are not happy, and when plants get too hot, they freak out!

Often the symptoms may vary quite a bit, even if you have the same underlying problem.

I fixed the problem (controlled heat, and proper watering practices). Symptoms stopped getting worse. Nearly all of them pulled through and made it to harvest.

Jump to…

Learn how to fix cannabis root problems

7-Step Cure to 99% of Marijuana Problems

Marijuana Problems – Picture Guide

Compare Different Grow Lights – Which one will work best for me?

The post Pictures of marijuana symptoms caused by over-watering, too much heat, and small containers appeared first on Grow Weed Easy.