Which Nutrients Are Best For Growing Cannabis?

Last updated Oct 26, 2023

by Nebula Haze

Table of Contents

What’s the Difference Between Cannabis Nutrient Brands?

7 Examples of Great Cannabis Nutrient Brands

Best NPK Ratios for Growing Cannabis

Organic vs “Chemical” Nutrients

 


 

What’s the difference between cannabis nutrients?

Once you start growing cannabis, figuring out the best nutrients for your setup can be confusing. There are many nutrient companies aimed at growing marijuana and each company creates multiple lines of nutrients and supplements for different purposes. Don’t worry, I’m going to break it all down so it’s easy for you to pick the best nutrients for your cannabis growing setup.

So many choices, so little information! How do you pick the right cannabis nutrients?

Life Stages and Cannabis Nutrient Needs

As a cannabis grower, your goal is to give your plants the nutrients they need, when they need it. There are two main life stages for cannabis plants (vegetative stage and flowering stage), and each stage has different nutrient requirements. The good news? Lots of nutrient companies make great products that work excellently for growing weed; they just use different formulas and blends.

What Makes Nutrients Different From Each Other?

  • Nutrient Ratios – Each brand has different nutrient ratios they believe are optimal for each stage of growth. Essentially, they each have their own “secret sauce” or recipe that they think works best. Note: The 3 numbers on the front of every nutrient bottle are known as “NPK”, which stands for Nitrogen (N), Phosphorus (P), and Potassium (K). These are the 3 nutrients your cannabis plants need the most.
  • Ingredients – Companies use many different combinations of chemical and organic compounds to create cannabis nutrients, and these affect how your plant absorbs nutrients. For example, two nutrient bottles with the exact same nutrient ratios on the label may have different effects on plants because they use different compounds. The ingredients also determine whether a particular set of nutrients are considered organic (come from living sources) or synthetic (come from processed minerals).
  • Soil, Coco, or Hydro? – It’s really important to match your growing medium with your nutrients. “Soil” nutrients are different from “Hydroponic” nutrients. Typically, hydroponic nutrients contain everything a plant needs to grow and can be used in any grow medium, while soil nutrients only provide some nutrients and expect your plant to be able to get some trace nutrients from the soil. Coco coir does not contain any nutrients so it is generally considered a type of hydroponics. If growing in coco, either choose hydroponic nutrients or nutrients made specifically for coco coir.

This picture shows an example of a full nutrients lineup for growing cannabis. This shows nutrients and supplements by General Hydroponics. Although supplements are nice, you can get all the way to the end of your grow without using any! Your base nutrients is all you need!

Important Tips on Cannabis Supplements

  • Supplements vs Base Nutrients: Know the Difference. Base nutrients provide all the necessary NPK and micronutrients for healthy growth, which means that supplements are not necessary for cannabis plants to thrive and produce an amazing harvest as long as you use good base nutrients. If you see that the NPK ratios printed on the front of a bottle are really low (like 0.2-0.2-0.1), that is one sign that this product is some type of supplement. Some supplements are helpful for growing weed, but going overboard may cause unwanted reactions or burn your plant. Do you need supplements to grow great weed?
  • Stick to One Nutrient Brand: Use nutrients and supplements from the same company or brand to minimize unexpected interactions. Combining nutrients and supplements from different companies greatly increases the chance of unhappy plants. It’s also a good idea when changing up your routine to only add one new supplement at a time and watch how plants react before adding anything else new or different. If this is your first grow, try to pick just one or two supplements that appeal to you. It’s easy to go overboard. Nutrient companies will happily sell you supplements you don’t actually need.

Now that you’ve got the basics, it’s time to learn how to find the best marijuana nutrients for your setup. Let’s go!

Example of a full cannabis nutrient lineup (this is the General Hydroponic Flora trio plus some GH supplements)

 


 

Examples of Great Cannabis Nutrients

I handpicked this list of nutrients for growing cannabis. Not only have I had great results with them, they have also been extensively tested by real marijuana growers. These nutrient systems are guaranteed to work well for growing cannabis when used properly.

Nebula Haze of GrowWeedEasy.com mixing up cannabis nutrients.

Honorable Mentions – I don’t have personal experience with these nutrient brands, but they are popular for growing cannabis.

  • Advanced Nutrients – One of the more expensive cannabis nutrient brands. The 3-part base nutrients are all you need to produce great yields and excellent buds, and this part is reasonably priced. However, Advanced Nutrients offers a ton of additional supplements to choose from. Here is an eye-popping $600 starter pack that includes multiple items from their lineup. Just remember, supplements are not necessary to produce great weed (and the truth is, they’re mostly water).
  • Jack’s Nutrients – Cheap dry nutrients that last forever. Supposedly can be used in any grow medium but I’ve mostly seen it used for growing cannabis in soil. I know several cannabis growers that swear by Jacks. Some growers use Classic 20-20-20 ($13) in the vegetative stage, and Blossom Booster 10-30-20 ($13) for the flowering stage. However, I wrote to Jacks Nutrients directly and asked, “Which Jacks Nutrients products do you recommend for growing cannabis?” and this is what they said.”Have you ever tested your water quality before? If not, you can find more information about our lab here. 20-20-20 and 10-30-20 are great formulas for gardening but are not the best choices for cannabis. Our 321 line is usually the best fit without a water test because it offers the most flexibility due to its 3-part system. Here is a copy of the schedule [PDF] for reference, but you can also find more information on 321 here.” The representative encouraged cannabis growers to write them directly with questions using the contact form at the bottom of their website home page.
  • Mega Crop – Supposedly for all grow mediums, it’s marketed as an all-in-one solution that gives complete nutrition from seed to harvest. However, I have been hesitant to try it because I know that cannabis plants seem to grow bigger buds when getting special nutrient ratios during bud formation (specifically cannabis plants in the flowering stage respond well to more Phosphorus and Potassium, with less Nitrogen). However, Mega Crop is extremely popular and many growers swear by it. The idea of having an all-in-one solution is intriguing, and I’ve seen many examples of great harvests. Mega Crop definitely can definitely grow great weed, but I haven’t personally used it yet.
  • Technaflora – Supposedly for all grow mediums, though I haven’t tried it yet on cannabis plants. This one is popular because it supposedly uses “only the finest raw materials”. I can say that many growers get great results with it for growing weed.
  • Nectar of the Gods – Another option that’s aimed at all grow mediums, though seems to really shine in soil. It is an organic, calcium-based line that is designed to “bind and carry nutrients into the root system” for plants to use. The company says it is most available to cannabis plants in the pH range of 6.2-6.8. Considering it uses organic ingredients, it shouldn’t be used in a grow that gives water via sprayers or misters as the ingredients can clog an irrigation system. An expensive nutrient option, but well-proven to get grow excellent organic cannabis.
  • Humboldts Secret Base A & B – Also marketed as good for soil, coco, and hydroponics. They also offer a Humboldt’s Secret Starter Kit with some of their most popular suppoments for those who want to try a “full lineup” of nutrients at a reasonable cost compared to alternatives like Advanced Nutrients. Cannabis growers espeically love their Golden Tree additive, especially in the flowering stage. Overall, this seems to be a solid choice for growing weed.

Many nutrient brands work great for growing cannabis from seedling to harvest

General Hydroponics Flora Trio

General Hydroponics

General Hydroponics offers a simple duo with one bottle for the vegetative stage, and one bottle for the flowering stage called FloraNova Grow + Bloom. This nutrient system is cheap, simple, and easy with excellent results in soil/coco/hydro. The biggest issue I have with the duo is the liquid is so thick it can be annoying to measure out.

However, their Flora trio is a winner. A tried and true favorite of mine, the Flora trio works very well for growing cannabis. I’ve had great success with it in every grow medium including soil, coco coir, and hydroponics. I used this nutrient system for almost a decade and have always been thrilled with the results. I’ve been testing new nutrient systems so I can report back to our readers like you, but based on my years of success I know you’ll be happy with the Flora trio. Best for…

  • Soil
  • Coco Coir
  • Hydroponics

 

·Soil, Coco Coir, or Hydroponics (DWC, Bubbleponics, etc)

General Hydroponics Flora Series Nutrient Trio + CaliMagic (add 1 tsp/gallon Hydroguard in hydroponics)

Follow the instructions on the side of the bottle at half-strength for great results in soil or coco. It’s recommended to also use a Cal-Mag supplement if using filtered water, growing in coco, or using and LED grow light (all tend to increase the Cal-Mag needs of your plant). I prefer the GH version called CaliMagic, and use it at 1 tsp/gallon. If growing in hydroponics with roots directly in water, use similarly to soil or coco, just make sure to also get Hydroguard to protect your hydroponic roots from root rot.

General Hydroponics CaliMagic Cal-Mag supplement Get CaliMagic at Amazon.com!

Add 1 tsp/gallon of Hydroguard to prevent root rot if growing cannabis in a hydroponic setup like DWC or Bubbleponics

Get Hydroguard on Amazon.com!

Check out a few different grow journals featuring the GH Flora trio

Examples of cannabis I’ve grown with General Hydroponics Flora trio:

General Hydroponics Flora trio using a 315 LEC grow light

Example of flowering cannabis plants that were grown under a 315 LEC grow lightGeneral Hydroponics Flora trio using an Electric Sky 300 LED grow light

 

Fox Farm Nutrient Trio

Fox Farm Logo

The Fox Farm trio is a popular nutrient system for cannabis growers that contains a variety of natural sources for nutrients like earthworm castings and bat guano, which cannabis plants thrive on. Fox Farm’s original nutrients contain too much organic matter for DWC/hydro, which increases the chance of root problems, but all that organic matter is great for plants in a hand-watered environment to enhance smell and flavor of your finished product. Fox Farm offer hydroponics-specific nutrients that don’t contain any organic matter called the “Cultivation Nation trio”, but this trio is not as good as the General Hydroponics Flora trio for growing cannabis, in my experience.

Best for…

  • Soil
  • Coco Coir

·Soil version

Fox Farms Nutrient Trio for Soil

Very concentrated, less is more. “Grow Big” & “Tiger Bloom” provide most of the major nutrients your cannabis needs, while “Big Bloom” has many micronutrients and beneficial compounds that help nutrient uptake and root health. This trio works extremely well by itself, just follow the feeding schedule (here’s a PDF, here’s a JPG) from Fox Farms at half-strength to start.

Check out a grow journal using the FF trio for Soil!

Fox Farms nutrient trio is a good nutrient system for growing cannabis

·Coco version

Fox Farms Nutrient Trio for Hydroponics & Cal-Mag

Use the “hydro” version of Fox Farms nutrients when growing in coco coir. Two bottles are the same as the soil trio, but the “Grow Big” bottle is formulated slightly differently for a soilless grow. Follow the feeding schedule (here’s a PDF, here’s a JPG) from Fox Farms at half-strength to start. Generally, the Fox Farms nutrient system will prevent Cal-Mag deficiencies, but it’s good to have extra Cal-Mag on hand just in case whenever growing cannabis in coco coir, if using filtered water, or if growing with LED grow lights.

Get Cal-Mag on Amazon.com!

·Hydroponic version

Fox Farms Cultivation Nation Trio (Micro, Grow, Bloom) & Cal-Mag

This is a Fox Farm copy of the General Hydroponics Flora Trio. It has the exact same nutrient ratios and the exact same ingredients as the General Hydroponics Flora trio. I’ve used it with good results over 2 different grows, though I personally prefer the Flora trio because the Cultivation Nation bottles tended to leak if the bottle was tipped over. A leaking bottle means that air is getting in, which will cause your nutrients to go back more quickly. I also noticed these nutrients tend to crystalize, while the Flora trio nutrients always are fully liquid.

I recommend getting General Hydroponics Flora trio instead of the Cultivation Nation trio. The Flora trio is cheaper and the nutrients are better.

 

Botanicare

Botanicare Logo

Botanicare is a great company that’s been around for as long as I’ve been growing, and whose supplements I’ve been using for years (specifically, their Hydroguard supplement is the most effective thing I’ve used to prevent root rot in a hydroponic setup). Best for…

  • Soil
  • Coco
  • Hydroponics

·Soil version (Organic)

Get the duo: Grow, Bloom

Use “Grow” in the vegetative stage, and “Bloom” in the flowering stage. Organic. Claims to be usable in hydro, but I’ve only seen growers use it in soil and the label says “soil” so that’s what I’m recommending it for 🙂

   

·Coco or Hydroponic version

Get the trio: GrowBloom, Base (need all 3 bottles for all phases of growth)

The three bottles are all that’s needed to get your plants successfully to harvest time, just follow the feeding schedule from Botanicare [PDF], starting at half the recommended strength. Hydroguard is an important root supplement that will help prevent your plant from getting root rot in a hydroponic reservoir. The KIND series has been highly recommended by several hydro growers I know in real life and Botanicare makes the best root supplement I know of for hydroponics.

Get KIND Nutrients from Amazon - good for growing cannabis hydroponically! Get KIND nutrients for hydroponic marijuana - on Amazon! Buy KIND nutrients on Amazon.com for your garden!

Add 1 tsp/gallon of Hydroguard to prevent root rot if growing cannabis in a hydroponic setup like DWC or Bubbleponics

Get Hydroguard supplement on Amazon.com to protect your marijuana roots!

From a grower: “Botanicare KIND is like the opposite spectrum [of the Botanicare Pure Blend series]. The Base is just Nitrogen and Calcium. Grow and Bloom both have most of the minerals in them, along with things like sea kelp. The Bloom is also 0-6-6. Grow at 2-2-4. So quite literally you can call the shots on Nitrogen and Calcium. That level of control hasn’t been around a great deal in our market. For the savvy grower, this is a pretty nice tool.”

 

House & Garden – Often difficult to find online!

House & Garden nutrients logo

The House & Garden lineup is an expensive but effective line-up. From a grower: “H&G was started by a top researcher from Canna. They are right outside of Amsterdam and because cannabis is legal there, so both Canna and H&G are able to do R&D using cannabis. I don’t know about Canna, but I know that House and Garden makes all their own nutrients in-house and they work great.”

The biggest downside of House and Garden (besides price) is it’s getting harder to find online. This brand is often best purchased in person at a hydro store. Get a custom nutrient schedule directly from the people at House & Garden via their free online nutrient calculator.

Name of base nutrients for…

This plant was grown using the House & Garden Line-up (A+B as base nutrients, plus the supplements Roots ExceluratorAlgen Extract, Bud XL, and shooting powder)

Incredibly huge cola, wow!Here's a picture of that cola on the live marijuana plant, just before harvest

Canna Coco

Canna Coco logoCanna Coco is a very popular company for pot growers. Their nutrients have been specifically designed to grow cannabis in coco coir (as you may be able to tell from the name).

  • Best for Coco Coir

Canna Coco A + B & Cal-Mag

This combo is a crowd favorite – many coco coir growers write in to tell us this is their favorite cannabis nutrient for growing in coco coir. Get a custom nutrient schedule from Canna or use this pre-made one [JPG].

Get Cal-Mag on Amazon.com!

From a grower: “Canna is a Dutch company and one of the best IMO. They make a great product line for growing in coco coir and test their products on real cannabis plants.”

Another grower said, “Canna products are one of the only nutrient lines to be developed primarily for cannabis (and tested on live plants). They’ve been doing so for almost 30 years. Cost is a little higher than competitors but worth every penny.”

A different grower added, “Canna – I have only used their coco line, but it is the highest quality you will find.”

 

Dyna-Gro

Dyna-Gro logo (nutrient company)

Originally designed for orchids, Dyna-Gro nutrients have proven to work exceptionally well for cannabis plants. If you want professional results without spending a ton of money or having to mix multiple bottles together, this combo gives your plants everything they need from seed to harvest. Dyna-Gro nutrients are suitable for any growing medium including soil, coco, or hydro.

  • Works great in Soil, Coco or Hydroponics

Dyna Grow (Foliage Pro + Bloom) – Use “Foliage Pro” in the vegetative stage and “Bloom” in the flowering stage.

Dyna-Grow Foliage Pro + Bloom is my recommended nutrient system for newbies. One bottle for the vegetative stage, one for the flowering stage. Super simple!

Dyna-Gro "Foliage-Pro" is a proven cannabis nutrient option for the vegetative stageDyna-Gro "Bloom" is a proven cannabis nutrient option for the flowering stage

Grow Journals featuring Foliage Pro + Bloom

Cannabis I’ve grown using Foliage Pro + Bloom

Dyna-Gro Foliage Pro + Bloom worked great under a tiny 65W LED grow light

One Last Tip…

When using a complete nutrient system like the ones listed above, always start at half the recommended strength by the manufacturer, and only increase nutrient levels if your plant is getting pale. If you’re giving too low levels of nutrients, the entire plant will start to appear overall pale or lime green. If you have a different nutrient deficiency (diagnose your plant here), chances are it’s caused by incorrect pH, not by too-low levels of nutrients.

It’s a good idea to always start at half the manufacturer’s recommendation! Most nutrient companies recommend way too much for growing cannabis!

Why not keep adding more and more nutrients? Doesn’t more equal better? No, nutrients are more like a multivitamin than food. After your plant has enough nutrients, adding more gives you diminishing returns, and too much starts causing the following problems.

A cannabis plant turns pale all over (left) when it needs higher levels of nutrients overall. If plant is a healthy green (right), stick to half the recommended dose.

Left plant needs more nutrients (pale green) while right plant is healthy (hunter green)

Too high levels of nutrients causes…

  • Nutrient burn – nutrient burn causes tips of leaves and edges of buds to appear burned. It isn’t a huge deal but doesn’t look as pretty, especially if it gets bad enough to spread to your buds.
  • Random nutrient deficiencies and lockout
  • Buds don’t grow as big as they could have in the flowering stage, especially if levels of Nitrogen are too high
  • Leaf discoloration may spread to the sugar leaves on the buds (not a big deal, but not pretty either)

Now that you understand everything you need to know about picking the right nutrient system, check out some supplements!

Learn About Cannabis Supplements:

 


 

What’s the Best NPK Ratio for Cannabis Nutrients?

For the best results, your cannabis needs the following nutrient ratios…

Chart diagram showing the optimal NPK nutrient ratios for growing cannabis or medical marijuana

Where is this information? Most nutrient bottles display 3 numbers, often called N-P-K, which stands for NitrogenPhosphorus and Potassium

Most cannabis nutrient bottles prominently display 3 numbers, called "NPK" which stands for Nitrogen, Phosphorus and Potassium. These numbers tell you the ratio between each of these nutrients in the bottle

Why “K” for Potassium? The atomic symbol of Potassium is “K” from Neo-Latin kalium.

In other words, you want to use a “Vegetative” (high Nitrogen) or “general purpose” nutrient formula for the first stage of life known as the vegetative stage. If using high-quality soil, you can skip vegetative nutrients for the first 3-4 weeks while your plant uses up the nutrients in the soil, otherwise, you should start with vegetative nutrients around the time your plant opens its first leaves.

Example of healthy green cannabis plants in the vegetative stage. At this phase of life, cannabis only grows stems and leaves, which requires a lot of Nitrogen!

Use a “Bloom” (low Nitrogen) nutrient formula with plenty of P & K for the flowering stage. Start using bloom nutrients when buds start forming to make sure your plant gets plenty of Phosphorus & Potassium, which are crucial to bud development.

Phosphorus tends to increase the number of flowers, while Potassium helps increase the bulk/weight of flowers. Be careful, though because going overboard with either one can burn your plants!

The main thing is to avoid giving too much Nitrogen in the flowering stage, as it can discourage bud development and add an unpleasant taste to buds, which is why a general-purpose plant nutrient isn’t a good choice in the flowering stage.

In a pinch, nutrients for Shultz “cactus” or “succulents” can be used in the flowering stage until you get better nutrients because it contains low amounts of N and plenty of P & K. 

Note: Don’t use any type of non-organic time-released nutrients (like fertilizer spikes, or “slow-release” Miracle-Gro soil) because they deliver too much N in the flowering stage and may reduce bud growth.

Cannabis needs plenty of P & K to make buds in the flowering stage!

Example of a cannabis plant in the flowering stage, growing big fat buds. In order to get the best yields, you need to use flowering nutrients that contain lots of P and K, but low levels of N

The Best Cannabis Nutrients Aren’t Enough! Check the pH of your water to plants to prevent nutrient deficiencies

It may surprise you that the most common reason growers get nutrient deficiencies is because the pH is too high or too low. This happens even if the right amounts of nutrients are present because your weed simply cannot absorb the nutrients if the pH isn’t in the correct range.

Optimum cannabis pH for..

Soil: 6.0 – 7.0
Coco Coir: 5.5 – 6.5
Hydroponics: 5.5 – 6.5

Checking the pH will make a huge difference to your grow by keeping plants vibrant and healthy. It only takes a few minutes each time you water your plants! If you get a digital pH pen, it only takes seconds to test your pH!

Learn more about pH & preventing nutrient deficiencies here!

A thick, colorful dense nug of cannabis - give your plants the right nutrients at the right time to get the best results!


 

Organic vs Chemical (Synthetic) Nutrients

This is a common question we get at Grow Weed Easy: Are organic nutrients better than chemical nutrients? It’s not a matter of which one is better, because they’re good at different things.

Organic Nutrients

  • Bud Smell & Taste – Many growers believe organically grown cannabis will create the most fragrant and “smoothest” buds. Some of the best benefits to smell and taste seem to come from using composted soil that’s been amended with nutrients from natural sources. This creates a living soil with colonies of beneficial microorganisms and is often associated with a bolder taste and smell in buds. However, watering your plants with liquid nutrients that just happen to be organic tends to get results similar to synthetic or mineral-based nutrients. It seems to be the soil that makes the difference when it comes to organic growing.
  • More Natural – Especially when growing in a living soil, you’re creating a home for your roots that is as close to nature as possible (only better because you’re making sure your plant gets everything it needs!)
  • Not for Hydroponics – Organic nutrients are not the best choice for hydroponic systems because any organic matter can cause unwanted stuff to grow in your reservoir. It’s possible to grow organic hydro but let me just say this: as of yet, I’ve never seen organic hydroponics go well for someone, though I wouldn’t mind being proven wrong 😉

Recommended Organic Nutrients

There used to be a ton of organic soil nutrients in bottles (like the now-discontinued GO Box) but many options have disappeared as growers switch to using amended compost for their organic nutrient needs. Why? The organic nutrients in bottles get similar results to mineral nutrients. The biggest difference in organic growing seems to come from using actual compost and/or amended soil.

Best supplement ingredients for organic growing

  • Sea kelp – a source of K (potassium), helps plants resist heat and stress
  • Leonardite – full of humic acids for happy roots, resist stress
  • Protein hydrolysate (contained in many supplements) – helps plants produce big roots and be more resistant to water stress
  • Potassium Sulfate (also called “Sulfate of Potash”) – the sulfur and potassium promote smells and bud development in the flowering stage

My favorite organic supplement contains all of the above: Floralicious Plus

How to Adjust pH in an Organic Soil Grow (regular PH Up and PH Down can harm the natural balance of the soil)

Learn more about testing pH with organic soil

Organic cannabis growing is rewarding!

Chemical Nutrients (including synthetic and mineral-based nutrients)

  • Possibly Increased Potency – While organic nutrients may increase the smell and taste of buds, chemical nutrients tend to increase the potency.
  • Faster Growth and Bigger Yields – Synthetic nutrients provide nutrients to plants in the most easy-to-absorb forms possible. This results in somewhat faster growth and improved yields since the nutrients don’t need to be broken down in the soil by a colony of microorganisms before they become available to your plant.
  • Only Choice for Hydro – These are the best cannabis nutrients for hydroponic systems because they are less likely to cause stuff to grow in the water reservoir. However, chemical nutrients can also be a great choice for soil or coco because of the increased potency and faster growth!
  • Easier to Get Nutrient Burn – Although you can give cannabis plants nutrient burn with organic nutrients, it’s much easier to give them nutrient burn with chemical nutrients. This is due to the easily absorbable nature of these nutrients. Synthetic nutrients get taken up by your roots whether the plant needs them or not.

The General Hydroponics Flora trio is a synthetic nutrient that’s so effective it was used by NASA to grow plants in space!

Don’t want to use nutrients at all? Learn how to compost your own super soil (or buy super soil pre-made online)! Super soil compost contains all the nutrients your plant will need from seed to harvest so you just need to add water. As an added bonus, with composted super soil you rarely need to worry about maintaining your pH. Instead, the composting process develops a colony of microorganisms in your soil that will automatically take care of the pH for your plants to an extent (like in nature), while slowly providing nutrients on demand.

Super soil compost has been amended so no additional nutrients are needed. Just add water!

Learn how to mix up your own marijuana super soil!


Can I create my own nutrient system?

Creating a nutrient system is more complicated than just adding “Nitrogen,” “Phosphorus” and “Potassium” plus all the various micro-nutrients in certain ratios. There several different chemical compounds that provide each of these nutrients and they’re not all equal.

Learn about creating a cannabis nutrient system from scratch

Get the "Hydroponic Handbook" on Amazon.com!Get the "Handbook of Plant Nutrition" online at Amazon.com!


 

More About Cannabis Nutrients

Common New Grower Topics

 


 

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