Go Green With The Best Organic Marijuana Nutrients

If you want to grow clean weed that’s free from synthetic compounds, heavy metals, and other undesirable chemicals — organic fertilizers are what you need.

From 100% natural ingredients to organically-certified products — we have the most extensive reviews of the best organic marijuana nutrients for sale for the 2024 growing season.

Once you finish reading our reviews, you’ll find the perfect organic nutrient line that’ll put inorganic products to shame. Are you ready to go green?

Let’s go!

The Best Organic Marijuana Nutrients – Summary

The Best Organic Cannabis Nutrients
Product	Rating	More Info
Best BundleGeneral Hydroponics General Organics Go Box	Price: 10/10 Quality: 8/10 Usability: 9.5/10	Check Price [Read Review]
Best Bloom EnhancerIncredible Bulk Bloom Booster	Price: 9.5/10 Quality: 10/10 Usability: 9.5/10	Check Price [Read Review]
Best Humic Acid NutrientRoots Organics Essential Earth	Price: 10/10 Quality: 9/10 Usability: 10/10	Check Price [Read Review]
Best Worm CastingsWiggle Worms Worm Castings	Price: 10/10 Quality: 9/10 Usability: 10/10	Check Price [Read Review]
Best Bagged SoilFox Farm Happy Frog	Price: 9.5/10 Quality: 9/10 Usability: 10/10	Check Price [Read Review]
Best Bat GuanoDown to Earth Organic Bat Guano	Price: 10/10 Quality: 9/10 Usability: 10/10	Check Price [Read Review]
Best Beneficial OrganismsMikrobs Microbial Superpack	Price: 10/10 Quality: 9.5/10 Usability: 10/10	Check Price [Read Review]
Best Kelp FertilizerBloom City’s Liquid Seaweed and Kelp Fertilizer	Price: 10/10 Quality: 10/10 Usability: 9.5/10	Check Price [Read Review]

What are Organic Marijuana Nutrients?

When it comes to cannabis cultivation (and agriculture for that matter) — organic nutrients or fertilizers refer to living matter that interacts with the deep web of soil biology.

Organic nutrients are not isolated compounds and molecules as seen in inorganic fertilizers. Instead, organic nutrients rely on various natural processes to unlock essential nutrients for cannabis-plant-uptake.

Therefore, organic nutrients promote ecological balance, biodiversity, and sustainable cannabis crops.

What is the Difference Between Organic Nutrients and Synthetic Fertilizers?

As you can see, organic marijuana nutrients have a similar degree of desirable traits akin to inorganic fertilizers.

However, organic fertilizers are far and away more sustainable for the environment, provide a low learning curve, and reduce salt accumulation in the soil.

Why are Organic Nutrients Considered “Living Soil”?

Living soil and organic nutrients are synonymous because they describe the fundamental aspect of synergistic cooperation to promote a sustainable ecosystem.

Remember, your cannabis crop is only one part of a broader ecosystem. When you grow organic weed — your soil is teeming with life, such as

• Beneficial insects (worms, ladybugs, wasps)
• Beneficial bacteria (rhizobacteria)
• Fungi (mycorrhizae)

How Nutrients are Unlocked in Organic Mediums

Now that you understand that organic fertilizers are a part of living soil — let’s take a deep, yet brief, look at how nutrients are released to marijuana plants for food uptake.

In their raw state, essential nutrients, such as nitrogen (N), phosphorus (P), and potassium (K), are locked in unusable forms and cannot be accessed by cannabis roots.

In organic mediums, nutrients must undergo natural cycles to become usable to cannabis plants. Below is a primary example of how nutrients in organic systems convert into usable forms for marijuana plant uptake.

Example of Nutrient Conversion: Nitrogen (N)

Nitrogen accounts for 78% of air found on Earth.

However, none of the N2 (atmospheric nitrogen) is available for plant use. Instead, nitrogen-fixing bacteria (rhizobacteria) found in organic soil convert N2 into NH3 (ammonia).

As the soil web deepens, nitrifying bacteria (Nitrobacter or Nitrosomonas) convert NH3 into NO3 (nitrate). It’s at this point that weed plants can uptake nitrogen in its available form — nitrate.

As you can see in this example — cannabis plants rely on beneficial organisms, such as bacteria, to unlock the right type of nitrogen. Without this plant-animal interaction — cannabis plants could not consume nitrogen for growth.

What’s Inside Organic Marijuana Nutrients?

Organic cannabis fertilizers contain all the necessary nutrients, vitamins, and minerals for weed crops. Let’s take a brief look at the different types of nutrients found inside organic cannabis fertilizers.

Macronutrients

Here’s an example list of macronutrients found inside organic marijuana nutrient products

• Nitrogen (N)
• Phosphorus (P)
• Potassium (K)
• Calcium (Ca)
• Magnesium (Mg)

Micronutrients

Micronutrients are essential for crucial plant functions, such as growth, flowering, and reproduction. Let’s take a look at a few example micronutrients found in organic marijuana fertilizers

• Iron (Fe)
• Boron (B)
• Zinc (Zn)
• Manganese (Mn)
• Copper (Cu)

Vitamins

Similar to micronutrients; vitamins play a vital role in cannabis crop health and overall vigor. Here’s a list of common vitamins routinely found inside organic weed fertilizers

• Vitamin A
• Vitamin C
• Vitamin B (broad range)
• Vitamin E

What are the Different Types of Organic Cannabis Nutrient Products?

Liquid Organic Marijuana Nutrients

Organic liquid (bottled) nutrients for weed plants are already decomposed and contain a bulk amount of readily (water-soluble) available food.

However, liquid organic nutrients feed cannabis plants over a much longer period when compared to inorganic fertilizers.

Granular (Dry) Organic Weed Nutrients

Dry (granular) organic cannabis products are typically bagged products that contain a mixture of composted soil or amendments.
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Examples of granular (dry) organic nutrients for cannabis crops are

• Bat guano
• Bone meal
• Worm castings
• Composted soil

Our Top-Rated Brands for Organic Certified Marijuana Nutrients

Below, you’ll find an upfront look at the most recommended brands that produce top-shelf organic nutrients for cannabis cultivators.

• Fox Farm
• Neptune’s Harvest
• Down to Earth
• Humboldts Secret
• General Hydroponics
• Incredible Bulk
• Wiggle Worm
• Roots Organics

Although this list of brands is not exhaustive — it represents top-rated organic marijuana nutrient brands and products that we review below.

How Do You Choose the Best Organic Marijuana Fertilizer?

If you want to get the most out of your cannabis crop — you need to choose the best organic fertilizer.

Below, we’ve put together a few essential questions that you must answer to ensure the best organic product is selected.

What Medium Are You Cultivating Cannabis in?

Organic nutrients can be used in soil, coco, and hydroponic-based substrates.

Although it’s more common to grow organic weed in soil and coco, hydroponics is an upcoming frontier that many organic-based cannabis brands are pivoting towards.

By knowing what medium you’ll grow weed in — the easier it is to choose an organic fertilizer

Do You Need an Organic Nutrient Kit or a Standalone Product?

When it comes to organic nutrients for cannabis crops, you’ll find two types of commodities — standalone products or complete nutrient kits.

Many organic liquid nutrient products come in kit-form, similar to inorganic products. For example, beginners typically prefer to buy an organic nutrient kit that contains a grow, micro, and bloom to cover the entire growth cycle.

Alternatively, cannabis cultivators can buy standalone organic products, such as

• Bloom enhancers
• Vitamin solutions
• Beneficial organisms
• Soil amendments

What is Your Preferred Budget Range?

Organic marijuana fertilizers cost anywhere from $20 to $100.

Typically, bagged organic soil that contains enough nutrients from seed to harvest is the cheapest product for sale. Alternatively, organic bottled nutrients are more expensive than inorganic nutrients but tend to go a long way due to their high concentration.

Considering Your Organic Cannabis Nutrient Options

As you can see — there are many organic cannabis nutrients for sale.

Instead of spending hours of research of your own time — we’ve taken up the leg work and reviewed the very best organic marijuana fertilizer products below. From organic nutrient kits to standalone products, we’ve put countless growing hours into our reviews for your convenience.

The 8 Best Organic Marijuana Nutrients

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1. General Hydroponics General Organics Go Box

The General Organics Go Box is rated as our best organic nutrient bundle because it offers crucial base nutrients and powerful additives in a single kit for a supreme marijuana harvest.

The Contents of the General Organics Go Box

• 1 x 16oz BioThrive Grow Bottle
• 1 x 16oz BioThrive Bloom Bottle
• 1 x 8oz BioThrive Root Bottle
• 1 x 8oz BioThrive CaMg+ Bottle
• 1 x 8oz BioThrive Weed Bottle
• 1 x 8oz BioThrive Marine Bottle
• 1 x 8oz BioThrive Bud Bottle
• 1 x 8oz Diamond Black Bottle

Start to Finish With the General Organics Go Box

First and foremost, the General Organics Go Box contains everything you need to kick-off and finish a complete grow cycle.

The kit contains two 16oz base nutrient bottles, which is more than enough to last four cycles when growing 1-4 cannabis plants. Furthermore, the General Go Box contains six supplements that add crucial micro and macronutrients, as well as humic acid and bloom enhancers.

When I feed my cannabis crop with the full General Organics lineup — my plants go crazy. From massive buds to incredible terpene production — cannabis was meant to be grown organic!

Final Thoughts For General Hydroponics’ General Organics Go Box

Although I wish General Hydroponics offered a bundle with larger bottle sizes, this kit does the job — and then some.

Growing weed organically has never been this easy, whether you’re a beginner or a professional. If you’re ready to go green — grab the General Organic Go Box.

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2. Incredible Bulk Bloom Booster

The Incredible Bulk Bloom Booster is rated as the best organic bloom enhancer because it offers an unsurpassed concentration of P & K for massive buds.

The NPK of the Incredible Bulk Bloom Booster

• Bloom Booster (0.1-10-25)

Start to Finish With the Incredible Bulk Bloom Booster

When it comes to bloom boosters for organic cannabis — it’s challenging to find a product with enough P & K to generate massive yields.

However, Incredible Bulk lives up to its name by providing the most potent (and organic) bloom enhancer for sale. After using Incredible Bulk’s Bloom Enhancer for multiple harvests — I can say that my buds have been bigger and denser when compared to inorganic bud boosters.

The Bloom Booster is incredibly easy to use and goes a long way. Overall, each pack provides growers with at least 25 gallons of heavy-hitting solution. In other words, this Bloom Booster is enough to last years of indoor or outdoor cannabis crops when growing 1-6 cannabis plants per season.

Best of all — the Bloom Booster is gentle on your cannabis plants due to its organic nature.

Final Thoughts For the Incredible Bulk Bloom Booster

If you’ve been tirelessly searching for an effective and organic bloom enhancer — look no further than Incredible Bulk’s Booster.

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3. Roots Organics Essential Earth

Roots Organics’ Essential Earth is rated as our best humic acid nutrient supplement because it offers high-grade humic acid at an affordable price.

The Ingredients of Roots Organics’ Essential Earth

• Natural Leonardite

Start to Finish With Roots Organics’ Essential Earth

As an organic cannabis cultivator — you need to dig deep to find products that enhance soil quality and overall plant health.

Humic acid is a key component in soil management, which in turn boosts crop health and yield. By following the recommended dosage from Roots Organics — I’ve managed to double my cannabis yields compared to years without it.

Although the 3-pound bag disappears in a jiff, it provides enough humic acid for one full grow cycle. However, I always opt for the 20-40-pound bag of Essential Earth to ensure I have enough for multiple crops.

From increased nutrient uptake to overall improved plant health, there’s a significant difference when harnessing the organic power of humic acid. Thankfully, Roots Organics’ Essential Earth is sustainably produced from leonardite, which is an added bonus for marijuana growers seeking eco-friendly humic acid.

Final Thoughts For Roots Organics’ Essential Earth

If you want to up the ante of your organic cannabis garden — it’s time to buy a pack of Roots Organics’ Essential Earth and give your cannabis crop a taste of humic acid.

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4. Wiggle Worms Worm Castings

Wiggle Worms’ Worm Castings are rated as the best organic worm fertilizer because it offers a pure source of worm manure that’s ideal for all stages of cannabis growth.

The Ingredients of Wiggle Worms’ Worm Castings

• 100% worm castings

Start to Finish With Wiggle Worms’ Worm Castings

Worm castings is a nicer way of saying worm poop.

In any case, you want worm castings mixed in your soil or soilless mix to enhance overall soil structure, moisture retention, porosity, plant health, and yield.

A single 35-pound bag of worm castings is enough to combine with your already-existing potting mix to fill upwards of sixteen 3-gallon containers. Therefore, depending on the number of cannabis plants you intend to grow — one bag of worm castings goes a long way.

Additionally, worm castings are extremely gentle and will not burn seedlings. By providing a small amount of nitrogen, worm castings are an excellent and organic way to push your cannabis crop towards a healthier and more sustainable life.

Final Thoughts For Wiggle Worms’ Worm Castings

No organic weed garden is complete until you enhance with the nutrients and minerals found in worm castings.

If you’re ready to witness lush green leaves and explosive bud growth — it’s time to unlock the secret of Wiggle Worms’ Worm Castings.

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5. Fox Farm Happy Frog

Fox Farm’s Happy Frog is rated as our best organic bagged potting soil because it offers an all-in-one mix of nutrients, microbes, and vitamins for full-length grow cycles.

The Ingredients of Fox Farm’s Happy Frog

• Composted forest products
• Bat guano
• Earthworm castings
• Dolomite lime
• Soil microbes (beneficial bacteria and mycorrhizae)

Start to Finish With Fox Farm’s Happy Frog

Sometimes, I don’t have the time to mix my own super soil mix.

Instead, I’ll reach for Fox Farms’ Happy Frog potting mix when I need nutrient-packed organic soil for my weed plants. From bat guano to worm castings, Happy Frog has enough nutrients to last from seed to harvest.

Additionally, Happy Frog is loaded with dolomite lime, which creates a stable pH range regardless of water quality. In other words, you won’t need to worry about lockouts or nutrient burn when using Happy Frog.

Lastly, the consistency of Happy Frog is beyond excellent, thanks to the composted forest materials found inside. From large bark pieces to smaller particles, your cannabis roots will thrive the moment they experience Happy Frog.

Final Thoughts For Fox Farm’s Happy Frog

At 51-quarts (12-gallons), you’ll have enough Happy Frog soil to fill four 3-gallon pots.

In other words, Fox Farms’ Happy Frog mix is the perfect solution for new cannabis cultivators that need a simple and easy way to grow organic weed at home.

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6. Down to Earth Organic Bat Guano

Down to Earth Organic’s Bat Guano is rated as our best natural bat fertilizer because it offers high-quality bat manure at an incredible price.

The Ingredients of Down to Earth’s Organic Bat Guano

• 100% sustainably-sourced bat guano (7-3-1)

Start to Finish With Down to Earth’s Organic Bat Guano

Whether you’re building your own soil or want to boost your current potting mix — bat guano is the GOAT nutrient supplement for cannabis plants.

I’ve found that the recommended dosage found on the back of the Down to Earth box is extremely adequate. 1-2tsp per gallon container is the sweet spot, and my cannabis plants turn a magnificent green color while promoting rapid growth.

Although the box contains 2-pounds of organic bat guano — you can rest assured that it goes a long way. At 1-2tsp per gallon container — you can amend the soil of a hundred gallons of soil with relative ease.

I’ve noticed incredible results when mixed directly with the soil or used as a foliar spray. Ultimately, I’ve yet to find a better bat guano fertilizer than Down to Earth’s product.

Final Thoughts For Down to Earth’s Organic Bat Guano

If you’re ready to give your cannabis plants a dose of exotic and organic fertilizer — look no further than Down to Earth’s Bat Guano.

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7. Mikrobs Microbial Superpack

Mikrob’s Microbial Superpack is rated as our best organic beneficial organism nutrient supplement because it offers a wide variety of essential bacteria and mycorrhizae to boost nutrient uptake and boost yields.

The Ingredients of Mikrobs’ Microbial Superpack

• Endomycorrhizae (4 species)
• Rhizobacteria (4 species)
• Beneficial fungi (3 species)

Also includes humic acid, fulvic acid, kelp extract, and molasses.

Start to Finish With Mikrobs’ Microbial Superpack

Considering organic soil means living soil — you need to jumpstart your soil with a wide variety of beneficial organisms.

The gap between soil with and without beneficial organisms is massive, and I would never try to grow weed in soil without a pack of Mikrobs’ Microbial Superpack.

I typically buy the 1-pound bag of Microbial Superpack because a little goes a long way. Whether I grow cannabis indoors or outdoors, I always sprinkle the recommended dosage across the soil.

The effects are notable, such as increased nutrient uptake, rapid growth, healthy plants, and, of course, massive weed flowers.

Final Thoughts For Mikrobs’ Microbial Superpack

If you’re ready to supercharge your organic soil mix with billions of beneficial organisms — grab a pack of Mikrobs’ Microbial Superpack and witness a profound increase come harvest time.

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8. Bloom City’s Liquid Seaweed and Kelp Fertilizer

Bloom City’s Liquid Seaweed and Kelp Fertilizer is rated as our best organic seaweed nutrient because it offers the perfect spectrum of plant food to ensure an unbelievable yield of terpene and cannabinoid-rich buds.

The Ingredients of Bloom City’s Liquid Seaweed and Kelp Fertilizer

• Sustainably harvested kelp (7 species)

Start to Finish With Bloom City’s Liquid Seaweed and Kelp Fertilizer

The ocean is loaded with essential micronutrients that can’t be found anywhere else.

Thankfully, seaweed and kelp is a sustainable and organic source that contains a rich spectrum of amino acids and micronutrients.

I always use a micronutrient supplement when growing organic cannabis, and, in this case, I typically choose Bloom City’s Liquid Seaweed and Kelp Fertilizer.

Whether you mix the recommended dosage in water or use it as a foliar spray — Liquid Seaweed and Kelp Fertilizer is the gold-standard when it comes to seaweed-based nutrients.

From lush green leaves to rapid growth — you’ll be stunned when you see how fast your cannabis plants react to a single dose of Liquid Seaweed and Kelp Fertilizer.

Last but not least, a single 32oz bottle of Liquid Seaweed and Kelp Fertilizer makes 180-gallons of solution. In other words — you won’t be running out of this nutrient any time soon.

Final Thoughts For Bloom City’s Liquid Seaweed and Kelp Fertilizer

If you’ve been waiting for the perfect seaweed-based nutrient for weed — it’s time to spring for a bottle of Bloom City’s Liquid Seaweed and Kelp Fertilizer.

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What are the Advantages to Using Organic Nutrients for Cannabis?

Below, we’ll briefly discuss the benefits of growing marijuana with organic fertilizers.

Organic Fertilizers Reduce the Potential of Nutrient Burn

As we described at the beginning of this guide, organic nutrients are released over time as they are broken down by beneficial organisms in the soil.

Therefore, cannabis roots are not suddenly shocked by a massive dose of available nutrients. Unlike inorganic nutrients, organic fertilizers are absorbed at a manageable rate for cannabis crops.

Ultimately, the potential of nutrient burn is drastically lower when compared to synthetic marijuana nutrients.

Organic Nutrients are Better for the Environment

Organic nutrients are harvested and produced in a sustainable manner.

Furthermore, organic nutrients do not disturb the environment, such as lakes, streams, oceans, and the soil. Unlike inorganic fertilizer, organic nutrients will not accumulate salt and drastically alter the natural landscape.

Organic Nutrients Last a Long Time

The beauty of organic nutrients lies in their concentration.

Most organic-based nutrients are highly concentrated and can be diluted over the course of months — if not years.

Although organic fertilizers may seem expensive at a glance — they are worth their weight in gold when you discover how much fertilizer they produce in the long term.

Organic Fertilizers are Easy to Use

Organic fertilizers are dead simple to use because they do not require the use of a pH pen or nutrient meter.

Ultimately, beginners or pros will benefit from buying organic fertilizers because they do away with complicated methods. Instead, growing weed with organic nutrients brings us back to a more simple and natural way of cultivating marijuana.

Conclusion

Overall, organic nutrients are an increasingly popular way to cultivate marijuana plants.

From enhanced flavor to massive yields, going green with your nutrient products is an effective way to transform your weed garden into a sustainable trichome paradise.

If you’re not completely sold on organic fertilizers, you should take a look at our Best Marijuana Nutrients for a wide range of top-shelf products.

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Category Pages:

If you’ve come this far then you’re probably doing your research on all nutrients. Luckily, we’ve reviewed dozens of high-quality nutrients so you don’t have to. We have more nutrients for you to look at and find the one that will suit your garden!

The Best Organic Cannabis Nutrients
Product	Rating	More Info
Best BundleGeneral Hydroponics General Organics Go Box	Price: 10/10 Quality: 8/10 Usability: 9.5/10	Check Price [Read Review]
Best Bloom EnhancerIncredible Bulk Bloom Booster	Price: 9.5/10 Quality: 10/10 Usability: 9.5/10	Check Price [Read Review]
Best Humic Acid NutrientRoots Organics Essential Earth	Price: 10/10 Quality: 9/10 Usability: 10/10	Check Price [Read Review]
Best Worm CastingsWiggle Worms Worm Castings	Price: 10/10 Quality: 9/10 Usability: 10/10	Check Price [Read Review]
Best Bagged SoilFox Farm Happy Frog	Price: 9.5/10 Quality: 9/10 Usability: 10/10	Check Price [Read Review]
Best Bat GuanoDown to Earth Organic Bat Guano	Price: 10/10 Quality: 9/10 Usability: 10/10	Check Price [Read Review]
Best Beneficial OrganismsMikrobs Microbial Superpack	Price: 10/10 Quality: 9.5/10 Usability: 10/10	Check Price [Read Review]
Best Kelp FertilizerBloom City’s Liquid Seaweed and Kelp Fertilizer	Price: 10/10 Quality: 10/10 Usability: 9.5/10	Check Price [Read Review]