Best Nutrients & Fertilizers for Growing Cannabis – Top Reviews

cannabis nutrientsLaw regulations that have recently come into force in the United States and some other countries have legalized growing marijuana for medicinal purposes and recreational use. That has removed the longtime stigma associated with cannabis forever. As a result, more and more people are raising marijuana crops at home in a controlled environment.

Growing cannabis can be a big business if you do it correctly. If you wanna get the first-class product at the end of the production process, it is essential to use the best nutrients for cannabis. Using the wrong type of marijuana fertilizer can drastically impact the quality of cannabis and lessen its effectiveness.

It is crucial to provide your crop with the right amount of nutrients for weed at the right time. Cannabis plants have two main life stages — vegetative and flowering — and they have different requirements in terms of nutrients during each stage. However, it could be a daunting task to choose the best soil for cannabis if you are a novice growing marijuana for the first time. This is why you should keep reading and figure out the best soil for weed.

Top 10 Nutrients & Fertilizers for Growing Cannabis

Product Image
Product Name
Life Stage
Growing Medium
NPK Levels/Nutrients
General Hydroponics Flora Grow, Bloom, Micro Combo Fertilizer set
& Hydroponic
FloraGro: 3-1-7,
FloraMicro 5-0-1,
FloraBloom 0-5-4
Fox Farm FX14049 Liquid Nutrient Trio Soil Formula
Big Bloom: 0.1-0.3-0.7
Grow Big: 6-4-4
Tiger Blom :2-8-4
General Hydroponics General Organics Go Box
& Hydroponic
16oz Bloom Fertilizers

16oz BioThrive Grow

8oz Samples of each GO Liquid Supplement
Humboldts Secret Golden Tree
Soil (Preferably) & Hydroponic
Advanced Nutrients Big Bud Liquid Fertilizer

& Hydroponic
Amino acids, potassium & phosphorus
Advanced Nutrients B-52 Fertilizer Booster
Vegetative (preferably) and Flowering
& Hydroponic
B vitamins
Advanced Nutrients Bud Candy Fertilizer
& Hydroponic
Magnesium is the main ingredient
Advanced Nutrients Overdrive Fertilizer
& Hydroponic
Phosphorus, potassium, hormones and catalytic agents
Advanced Nutrients Bloom, Micro & Grow
Soil & Hydroponic
Bloom: 2-0-0
Micro: 1-3-4
Grow: 1–0-4
Dyna-Gro Liquid Grow & Liquid Bloom
& Hydroponic
High phosphorus formula with 10 essential micro-nutrients

There is a large number of nutrient companies these days. They offer multiple types of nutrients and fertilizers for different purposes. To narrow down your choices, we have picked top ten nutrients and fertilizers for growing cannabis.

Best Marijuana Nutrients & Fertilizers

1. General Hydroponics Flora Grow, Bloom, Micro Combo Fertilizer set

Did you know that scientists working for NASA have used General Hydroponics fertilizers to raise plants in extreme conditions? The results have been really impressive thanks to the great reliability and superior formulation of these fertilizers. This should encourage those people wanting to use Flora Fertilizer Set for growing cannabis.

The General Hydroponics Fertilizer set is specially designed for those growing plants with hydroponics systems, and it is great for both advanced growers and beginners looking for general organics nutrients. This powerful set presents a PH balanced pack that provides everything needed to start growing.

You have three liquid nutrients at your disposal:

  • FloraGro stimulates vegetative and structural growth while building strong roots at the same time.
  • FloraMicro provides Calcium, Nitrogen, and Potassium along with trace elements.
  • FloraBloom supports the plants during the flowering stage, stimulating flower and fruit development. It is proven to enhance the aroma, flavor, and essential oils in plants.

What makes it one of the best hydroponic nutrients for growing cannabis is its suitability for all the growing cycles. It is recommended for every life phase to make your plants disease-resistant and healthy. Besides, it is very soluble because of highly purified concentrates, which lets the herbs have maximal nutrient uptake. That results in superior and abundant yields.

You can have total flexibility with this batch of feed. Just tweak the mixtures as per the specific requirements of your plants. Make use of Flora Series to adjust blends of nutrients in a way that work best for your plants. Once you’ve got it right, your herbs will love it.

Key features:

  • Pack of 3 fertilizers: FloraGro, FloraMicro, and FloraBloom
  • Building Block Nutrient System
  • Mix of primary and secondary nutrients with micronutrients
  • Suitable for both soil and hydroponic cultivated plants
  • Great for all the growing cycles
  • Contains highly purified concentrates
  • PH balanced

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2. Fox Farm FX14049 Liquid Nutrient Trio Soil Formula

Fox Farm is considered to be a hard hitter when it comes to marijuana nutrients. Apart from producing a wide range of soil lines, this family-owned company has also specialized in plant feed. Today, Fox Farm nutrients are popular among weed growers all around the globe. FX14049 Trio Soil Formula has gained a reputation as one the best fertilizer for marijuana and the best liquid fertilizer in general.

Unlike other products, you can use this 3 solution product for each growth phase, even during the later life stages of the plants. It’s amazing for vegetative stage and excellent during flowering alike. Just make sure to select the right bottle for each stage of the growth cycle.

There are 3 bottles in the package to try out:

  • Grow Big encourages lush vegetation and makes the roots much stronger. You should use it during the veg stage for a thriving growth.
  • Tiger Bloom stimulates the plants create more flowers and big buds. You should use it during flowering phase.
  • Big Bloom enhances nutrient cycle while healing root system. You can use it as a supplement throughout the entire growing cycle.

Your best bet is to stick to Fox Farm feeding schedule for cannabis that suggests starting with Fox Farm Grow Big, switching to Tiger Bloom when your plants begin to bud and using Big Bloom throughout the whole cycle. That schedule ensures that you reap the benefits at the end of the growth cycle.

If you don’t know how to grow big buds indoors, just go for this product and it will do the trick. Over time, you will notice how the buds get denser and have great flavor. If you grow marijuana in the open air, be sure to follow fox farm outdoor feeding schedule and directions on the bottles for the best results. Moreover, you can use this all-in-one system in soil and coco coir as well.

This 3-pack formula is perfect for all first-time marijuana growers because it’s really hard to go wrong with it. All of this makes it by far the best liquid nutrients for cannabis. Unfortunately, it doesn’t work well for hydroponics, so keep it in mind.

Key features:

  • 3-pack formula: Grow Big, Tiger Bloom, Big Bloom
  • Good for every stage
  • Excellent in vegetative stage
  • Great results during flowering
  • Stimulate development of ultra-strong roots
  • Comes in liquid form
  • Ideal for late-season, mature flowers and fruits
  • Not suitable for hydroponics

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3. General Hydroponics General Organics Go Box

Here’s another general organics review you might be interested in. General Organics is a popular brand among gardeners and farmers who specialize in organic production. It has also gained popularity among marijuana growers in the recent years, as it works great for both hydroponic (water) and soil cannabis gardens. Many weed farmers found it a winning combination of nutrients incredibly successful for growing cannabis.

If you’re looking for soil cannabis nutrients, look no further than General Hydroponics General Organics Go Box. It is highly recommended for those growing cannabis in the soil for the very first time because the chances are small to screw up something with this cannabis fertilizer.

By using this nutrient for growing cannabis, you can eliminate the need for plant additives. It ensures you get greener, thicker, and larger plants in your crop. If you’re all for growing cannabis “naturally” in the soil, then this product is right for you. It works surprisingly well for most types of soils, making weed develop and grow rapidly.

This marijuana plant food is amazing during the vegetative stage and is also good during the flowering stage. It makes the buds accomplish the max potential and become considerably larger.

The GO Box starter kit comes with bottles of 16oz. BioThrive Grow as well as 16oz. BioThrive Bloom fertilizers, plus 8-ounce samples of Go liquid nutrients such as BioWeed, BioRoot, BioBud, BioMarine, CaMg+, and Diamond Black. So, everything you might ever need to use for your crop is included in one box.

Key features:

  • Fully organic
  • Biological supplements and plant foods
  • Great for soil
  • Suitable for media cultures
  • Promotes bigger and tastier buds
  • Promotes optimal growth

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4. Humboldts Secret Golden Tree

While aforementioned products are particularly intended for cannabis, Humboldts Secret Golden Tree is an all-rounder that can be successfully used for a broad assortment of vegetables, fruits, and flowers. If you want to maximize the quality of your crop and boost yield, this weed fertilizer will deliver all the nutrients your herbs cry out for.

This product gives cannabis plants the leg-up they need to grow healthy in both life stages – vegetative and flowering. In fact, this plant food for weed “hurries” the herbs through the veg stage, making the weed develop strong roots and grow healthy, fast, and tasty. It is also great for flowering stage thanks to its ability to increase the number of flowers. As a final result, the yield is getting increased by 20%.

Let’s see how to feed marijuana plants with this weed plant food. When mixed with water, the 16-ounce bottle can make up to 250 gallons (about 36.5 liters) of nutrient solution. Humboldt recommends using this product 1-3 times per week, which primarily depends on the strength of your plants and how well they are responding. You’re advised to add 2ml of nutrient per gallon of water into your reservoir during the vegetative cycle. Make sure to mix in base nutrients as well. Likewise, you need to add  5ml for each gallon when your plants hit the flowering stage. You should use from 15-30ml of feed per gallon of water on a sick (dying) plan at a time. Then proceed with normal feeding. Note: If you’re growing with hydroponics, be sure to cut down doses in half.

Key features:

  • Great for both vegetative and flowering stage
  • Improves general health
  • Enhances yields by up to 20%
  • Shorten vegetative stage by up to 50%
  • Works well on all trees, bushes, plants, and flowers
  • Can be combined with other nutrients

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5. Advanced Nutrients Big Bud Liquid Fertilizer

Advanced nutrients packages have established themselves as the gold standard when it comes to the weed nutrients and solutions for growing marijuana. If you are one of those persons passionate about growing big and tasty buds then the Advanced Nutrients Big Bud Fertilizer is right for you. It doesn’t matter if you are raising marijuana in soil or with hydroponics, as this liquid fertilizer is great for both options.

This fertilizer specifically made for the second through the fourth weeks of flowering with a goal to improve density, weight, and quality of buds. Besides, it can also improve taste and smell of buds. This way it helps cannabis plants reach their maximum potential and have the strongest flavor possible.

Take into account that this product is designed as an additive to be used during flowering, not the weed food for vegetative stage.

Key features:

  • Great during flowering
  • Makes buds larger and tastier
  • Stimulates buds develop more THC
  • Increase the number of flowers
  • Increases yields
  • Pretty affordable

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6. Advanced Nutrients B-52 Fertilizer Booster

Speaking of advanced nutrients for cannabis, we must mention B-52 Fertilizer Booster. It provides a balanced, complete spectrum of vitamins and other compounds that ease uptake of nutrients for growth, minerals, vitamins, and water without exhausting the herbs. That eventually results in better-branched plants with the stronger root system.

This powerful fertilizer for cannabis contains water-soluble hamates, such as vitamins and hormones, that raise the plant’s metabolism and increase root growth. In addition, it can significantly speed up seed germination.

You can use this fertilizer for marijuana in any growing medium, including hydroponic setup, soil, and sphagnum moss during the entire lifetime of plants from seed to harvest. Just make sure to check out water PH on a regular basis when applying it.

Key features:

  • Supports seed germination
  • Amazing during vegetative stage
  • Great for transplantation
  • Makes roots super-strong
  • Better yield

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7. Advanced Nutrients Bud Candy Fertilizer

If you want to improve the taste and aroma of the buds, then the advanced Bud Candy Fertilizer is all you need.

It boasts a formula that makes the buds grow faster and be better in terms of smell and flavor alike. As its name implies, this product can make the buds acquire a stunning candy-like fragrance. Aside from that, this mighty fertilizer for weed can protect your clones, transplants, and seedlings from any failure, which results in a better survival rate of your crop.

The Advanced Nutrients Bud Candy Fertilizer is meant to boost the growth of the plants during the first six weeks of flowering. However, it isn’t suitable for the vegetative stage. It can be combined with other advanced nutrients.

Key features:

  • Sweeter and tastier buds
  • Makes buds grow faster
  • Great as additive during flowering stage
  • Better survival rate
  • More abundant yields

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8. Advanced Nutrients Overdrive Fertilizer

Many pot growers regard Overdrive nutrient as one of the best advanced nutrients for soil because of its well-balanced nutritive formula. It supplies plants with a proper balance of potassium and phosphates along with complex vitamins, catalytic agents, hormones, as well as other cofactors that contribute to fuller yields.

Advanced Nutrients Overdrive is specially designed to help the plants take more nutrients during the later flowering stage, and thus gain extra size and weight. So, be sure to use this flower booster in the last three months of your cannabis plants’ growth. Those weeks present a critical phase of growth when the herbs show the most sizeable gains.

Key features:

  • Enhanced nutrient uptake
  • Bigger buds
  • Larger flowers
  • Improved aroma and taste
  • Increased potency

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9. Advanced Nutrients Bloom, Micro & Grow

Here’s another advanced solution for fans of kits that can make all the difference to a weed crop.

Being offered as a 3-package of base nutrients in a 1-liter bottle, Advanced Nutrients fertilizer is a great foundation for growing cannabis. It allows you to grow healthy cannabis plants with ease without having to worry about how to balance PH in your growing medium.

All you need to do is follow the provided instructions to provide your weed with the right amount of nutrition at right time. Start with Grow and Micro in the veg stage to improve soil and make your plants develop strong roots. Then proceed with Bloom growth formula when your plants reach the flowering stage. By doing so, you will get the maximum of your harvest.

What’s more, you can combine it with other fertilizers to help your plants grow faster right from the start.

Key features:

  • All-in-one solution: Bloom, Micro and Grow
  • Good for every growth stage
  • Provides top-quality carrier molecules
  • Improves nutrient uptake
  • Contributes to more abundant yields

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10. Dyna-Gro Liquid Grow & Liquid Bloom

Dyna-Gro is a great alternative if the price is a concern for you when purchasing cannabis advanced nutrients. It is perfect for novices looking for a simple yet cost-effective solution for marijuana growing.

You can use these weed fertilizers from seedling to harvesting. Just make sure to apply Dyna Gro feeding schedule properly. You need to use Dyna-Gro Liquid Grow while your plants are in the veg stage and switch to Dyna Gro Bloom when the plants start blooming.

Whether you are growing cannabis hydroponically or in the soil, this is an efficient solution for you. Those growing in coco coir should also take it into consideration. It will take your plants to the next level!

Key features:

  • Contains all the macronutrients and micronutrients necessary for plant’s growth
  • Robust vegetative growth
  • A larger number of blooms
  • Ideal for poor soils
  • Suitable for container grown plants

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What to Consider When Buying Nutrients, Fertilizers for Growing Cannabis

When you are considering purchasing a nutrient for growing cannabis, there is a handful of factors to think about. Before making the final decision, take into consideration the following things when buying the fertilizers and nutrients for cannabis.

Life Stage

Make sure to pick the right nutrient with optimal NPK values for the current life stage of your plants, be it vegetative or flowering. While being in vegetative stage, plants need high Nitrogen levels. By contrast, you should go with low Nitrogen levels during the flowering stage. Therefore, use a general purpose “Vegetative” nutrient formula while your plants are still in the first stage of life; use a “Bloom” plant nutrient formula with plenty of Phosphorus and Potassium for the flowering stage when buds begin to form.

Chemical vs Organic Nutrients

It is not a matter of which ones are better, as they are meant for different things, but which one to choose for the particular situation.

Chemical nutrients promote faster growth and increased potency, whereas organic-based nutrient systems contribute to better smell and taste of buds. Organic nutrients for cannabis are suitable for growing in a living soil but they aren’t a great choice for hydroponics. On the other hand, most chemical plant nutrients work well for hydroponic systems. However, those nutrients are also convenient for soil or coco.

Soil or Hydro

Let’s follow up on the previous thought regarding plant nutrients. There are two options to choose from when purchasing nutrients for growing marijuana – soil and hydroponics. They are completely different, so be sure to get the right kind. It’s of utmost importance to properly match your nutrients with your growing medium. Consider whether you’re growing your plants in soil or water, and choose the nutrient accordingly.


There is a large number of combinations of organic and chemical compounds that can result in same nutrient levels. What’s more, compounds react differently with each other. So, don’t be surprised if you see two different products with the same NPK ratios. Nevertheless, those bottles will provide slightly different nutrients levels to your plants.

In addition to NPK levels, you should also take a look at other ingredients included. Producing flourishing, healthy plants requires top-notch nourishment with the best ingredients. Each of the above-mentioned products is proven to have the best ingredients, so you can rest assured that your weed will be strong and healthy if you use them.

Our Final Review

Like people, not all herbs are equal. If a certain fertilizer is good for your houseplants that doesn’t mean it will also be good for your marijuana plants. The type of nutrient and fertilizer you select for your herbs can determine whether your crops will prosper or grow feeble.

Therefore, consider buying the best fertilizer for marijuana that ensures the astonishing growth of your plants. Use the picks listed here and you will get the most out of your crop for sure.

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