Top 7 Hydroponic Fertilizers – Review And Buying Guide

Are you having trouble with finding the ideal hydroponic fertilizer option for your garden? Look no further. This article will walk you through all the criteria of a good product.

Fox Farm Liquid Nutrient Trio Soil Formula - Big Bloom, Grow...
6,184 Reviews
Fox Farm Liquid Nutrient Trio Soil Formula - Big Bloom, Grow...
  • A three-pack of favorite liquid fertilizers from FoxFarm
  • Grow Big produces lush, vegetative, compact growth
  • Tiger Bloom is an ultra-potent, fast-acting, high-phosphorus...

After understanding what you should look for, we will introduce you to the top 7 highly recommend products. In brief, here is our best suggestion: the Fox Farm Liquid Nutrient Trio Formula.

This one contains all the essential nutrients for the healthy growth of hydroponic plants, bringing you a yield more abundant than ever expected.

Yet, that’s not the best part. This trio concentrates most on the vegetative growth and flowering stages, which are the foundation of the main crops with better productivity.

Top 7 Hydroponic Fertilizers To Consider Purchasing

Fox Farm Liquid Nutrient Trio Formula – Best Overall

Fox Farm Liquid Nutrient Trio Soil Formula - Big Bloom, Grow...
6,184 Reviews
Fox Farm Liquid Nutrient Trio Soil Formula - Big Bloom, Grow...
  • A three-pack of favorite liquid fertilizers from FoxFarm
  • Grow Big produces lush, vegetative, compact growth
  • Tiger Bloom is an ultra-potent, fast-acting, high-phosphorus...

This trio series includes three liquid nutrients formula options: GrowBig, BigBloom, and TigerBloom.

Unlike the three-step products from other brands, this one doesn’t contain the base option. Instead, you get two separate Bloom nutrients formulas.

The GrowBig concentrates on increasing vegetative and growing leaves during the new stage of a growth cycle. It helps the plants become bigger and stronger, leading to better overall output.

TigerBloom is the perfect option once the first signs of the flowering phase start to show. This formula supplies essential nutrients such as nitrogen and phosphorus to help the plants grow to their fullest.

You can use the BigBloom throughout the seasons since it is very gentle and won’t burn the leaves. However, as you can use Big Bloom on regular applications, it might run out quicker than the other two bottles.

What we like:

  • Two separate Bloom formulas
  • Ideal for flowering period
  • Wide range of nutrients

What can be improved?

  • Big Bloom might run out faster than the other two.

Advanced Nutrients Bloom, Micro & Grow – Best For Balancing PH Level

Advanced Nutrients Bloom, Micro & Grow, Pack of 3, 1 L Each
  • Lush, sturdy growth from 3-part nutrients designed...
  • 3 Part solution in 1 package: You get advanced nutrients...
  • State-of-the-art carrier molecules to ensure their plants...

This multistep fertilizer offers your crops the exact amount of nutrients they need for healthy development. Your buds will benefit from a wide range of vital supplements such as fulvic acid, non-ionic surfactant, and amino acid.

The Micro contains a variety of nutrients and produces the base of the fertilizer. Once your crops reach the vegetative stage, using the Grow will maximize the consistent growth to prepare the plants for their flowering phase.

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To gain the best and most significant results, you want to apply the Bloom formula of the set since it provides additional minerals like sulfur, iron, or magnesium.

The balance-free PH technology helps adjust and calibrate the PH level so that you won’t have to use PH-adjusting chemical supplements.

The quality of the formula is unquestionable, but the product packaging is average and can easily be damaged due to the low price point.

What we like:

  • Boost the buds’ growth
  • Balance-free PH technology
  • Provide a wide array of nutritional supplements

What can be improved?

  • Average packaging quality

General Hydroponics Flora Series – Best Series Set

General Hydroponics FloraSeries Hydroponic Nutrient...
  • The Flora Series is a hydroponic-based nutrient system that...
  • Nutrients included in the Flora Series are FloraMicro,...
  • FloraMicro is rich in nitrogen, calcium, and chelated...

This series contains three different nutrient formulas: FloraMicro, FloraBloom, and FloraGrow, which target distinctive liquid nutrient concentrations.

These three exclusive solutions allow you to customize your fertilizing sessions, providing your plants precisely what they need to have healthy growth cycles.

The FloraMicro is the set’s foundation. It is a mixture of calcium, nitrogen, and trace minerals, all essential nutrients during the plant’s production cycle.

The FloraGrow will come in handy once the vegetative phase starts to kick in. It increases the potassium and nitrogen levels to make the roots stronger, giving you better growing results.

Lastly, the FloraBloom offers vital nutrients such as magnesium, sulfur, and phosphorus. These nutritional supplements are necessary for developing flowers and fruits.

However, due to the low-cost production, the bottles’ lids may not close properly after taking off the safety seal.

What we like:

  • Each formula target different concentrations
  • Full of essential nutrient components
  • Affordable

What can be improved?

  • Not seal properly lids

General Hydroponics GH5100 General Organics Go Box – Best Organic Fertilizer For Hydroponics

General Hydroponics GH5100 General Organics Go Box GH,Black
  • General Organics Provides Gardeners With A Complete Line Of...
  • We Combine The Time-Tested Ingredients Of Traditional...
  • General Organics Now Has The Go Box Starter Kit

If you are looking for an organic hydroponics fertilizer choice, Go Box is the ideal choice you shouldn’t miss. The package includes a 16-ounce BioThrive Grow bottle and a 16-ounce BioThrive Bloom bottle.

The primary function of the BioThrive Bloom is to enhance flowers and seed production. It also improves the plants’ health so that they can survive through harsh environmental conditions.

On the other hand, the BioThrive Grow is better used at the early phase of the growing cycle since it can strengthen the root systems and potentially prevent root infections.

Besides the BioThrive line, the package contains six other samples for you to try out: Diamond Black, CaMg+, BioBud, BioWeed, BioRoot, and BioMarine.

Each of them has a capacity of eight ounces, enough for you to experiment to find out what works most efficiently for your garden. The only downside of this purchase is the unpleasant smell since they are organic products.

What we like:

  • Perfect to use at early growing cycles
  • Contain 6 samples to experiment
  • Offer all organic nutrients

What can be improved?

  • Unpleasant odor

Hydroponic Nutrient Solution Part A And B – Best Complete Plant Food System

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The package includes two bottles with 16 necessary and essential elements for an overall healthy development cycle. You can use this unique solution for various plants, such as common fruits, herbs, and vegetables.

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It also offers you flexibility since you can apply it for all gardening approaches like soil-less, commercial-scale hydroponics, and even soil growing methods.

The application is effortless. Measure one ounce from each bottle, pour the liquid into a mixing bucket, and start stirring. Let it sit for a few minutes; then, you can apply it to your garden.

The only thing to complain about this liquid product is the mediocre packaging. You will need to store these plastic bottles in a safe and dry space to avoid spilling.

What we like:

  • Packed with abundant nourishment sources
  • Appropriate for all types of gardening approaches
  • Suitable for many types of plants
  • Simple application process

What can be improved?

  • Potentially leaking packaging

Bush Load Fertilizer General Hydroponics – Best Premium Option

Suppose money is not one of your concerns; then this Bush Load formula is the one you want to try out. It is a concentrated hydroponic production regulator with 0.4% Paclobutazol, allowing you to grow specific varieties and strands that tend to grow too tall.

This one-step product will bring you the healthiest and most vigorous plants that you’ve ever grown. The roots can easily absorb the nutrients that this product provides.

Once you use it, you will notice that you have a long-lasting uniform canopy in your grow rooms. Plus, this solution helps you to prune your workload, making application an effortless task.

Remember to read the instructions carefully and use it in the right dosage since it is a chemical fertilizer, meaning it might be dangerous if you apply more than you should.

What we like:

  • Potent
  • Easy to absorb into the root systems
  • Long-lasting effect
  • Uniform development regulation

What can be improved?

  • Chemical components

General Hydroponics Liquid KoolBloom – Best For Limited Budgets

General Hydroponics Liquid Kool Bloom Fertilizers, 1-Quart
  • Encourages abundant flowering
  • Facilitates ripening in annuals
  • Boosts production of essential oils and fragrances

If you are on a budget or a beginner who doesn’t want to spend too much money on one-step fertilizer, this product is the name to remember. It provides nutrients such as nitrogen, potassium, and phosphorus, encouraging better plant growth and more extensive bloom.

This bulking formula is not only suitable for hydroponics but also soil systems. The enhanced production rate of enzymes and oils promotes the flowers to blossom and even extends their lifespan.

You want to apply this fertilizer during the last two weeks of gardening so that your plants can benefit from the amount of potassium and phosphorus, bringing you additional bloom boost and facilitating ripening in annuals.

Keep in mind that this product can explode if exposed to hot temperatures for an extended period. Therefore, the best way to store Liquid KoolBloom is to put it in a cool and dry place.

What we like:

  • Affordable price point
  • Suitable for beginners and inexperienced
  • Work for both soil and hydroponic systems

What can be improved?

  • Sensitive to hot temperatures

Buying Guide for Hydroponic Fertilizers

What Are Hydroponic Fertilizers?

They are the type of soluble fertilizer formula specialized for the plant’s cultivation in water, which only works for gardening without soil. A good formula contains all the vital nutrients components specialize for this type of agriculture.

You can technically use regular types of fertilizers for your hydroponic garden. However, if you want to maximize the potential yield, you will want to consider hydroponics fertilizers.

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Nutrients That Plants Need

Nutrients are the plants’ life sources. They divide into 3 main groups: macronutrients, mesonutrients, and micronutrients.


These are the essential nutrients that determine the plants’ general health.

  • Nitrogen (N) is a critical component of chlorophyll, an essential molecule in photosynthesis and is responsible for leaf growth.
  • Phosphorus (P) promotes the root systems and development of fruit. Lacking this nutrient will lead to low-quality yields.
  • Potassium (K) impulses the water regulation, playing the main role in the vegetative and flowering stages.


Mesonutrients, also known as secondary nutrients, are equally necessary for the plant’s growth process but in a negligible quantity.

  • Magnesium helps in the protein synthesis process, and it can stabilize the cell membranes, maintain strong development, and prevent insects or diseases.
  • Calcium plays a part in strengthening the cell structure, giving the plants the ability to fight off pest infestation or harmful and dangerous bacteria.
  • Sulfur is the primary factor that helps plants to metabolize nitrogen more effectively in the photosynthesis course.


The plants can benefit from these additional nutrients even in tiny doses. The primary nourishment sources you want to remember are boron, iron, zinc, manganese, etc.

Hydroponic Fertilizer Types

Hydroponics systems are more demanding than regular soil systems since they require a crafted supplement to incorporate into solutions for the plant nutrients. These supplements are categorized into dry or liquid form.

Dry Fertilizers

They usually come in powder or granular forms. These are more suitable for commercial growers since their prices are lower, and the lasting time is longer.

Still, this type of powdered fertilizer requires you to be an experienced grower who has certain knowledge to achieve the fullest benefits. You will need to understand:

  • How to create the mixture properly: You will dissolve all the powdered nutrients in individual buckets with water and combine them into one solution later.
  • What nutrients are suitable for your types of plants: All plants need the 3 core macronutrients. Different plants need different supplements and nutrient dosages.
  • Stages of growth: To have the correct ratios depending on what stage your plants are in. Knowing the doses of trace elements at different points of the growing process will bring you the best harvest results.

Liquid Fertilizers

There is no difference in nutrient quality between dry and liquid forms. This type of fertilizer is easier to use than the dry formula, making it the ideal choice for those who do not have much experience in gardening or home growers in general.

You can start using these fertilizers immediately with no difficulty. Generally, you can use most liquid hydroponic nutrients formulas for widespread use, so it is hard to find the crop-specific composition on the market.

Features To Look For When Choosing Hydroponic Fertilizer

Even though you can use regular fertilizers on your hydroponic plants, ideally, you want to use the customized solutions for your types of crops. Here are some factors to consider while choosing hydroponic fertilizer:

  • N-P-K primary nutrients proportion (“NPK” short for nitrogen, phosphorus, and potassium),
  • The stage that your plants are in,
  • Parts of plants you want to focus on and promote,
  • Benefits the crops can get,
  • Essential nutrients,
  • The price point of the product.

The simple but effective method of making a hydroponic solution for the growth of various plants.


There you have a complete guide on choosing the best hydroponic fertilizer and our product recommendations.

The Fox Farm Liquid Nutrient Trio Formula is on top of the list due to its exceptional performance at the blooming stage. It being an ample nutrients source also plays an important role.

Last update on 2024-06-07 / Affiliate links / Images from Amazon Product Advertising API

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Jill Sandy

I am a sustainable focus gardener. I love decorating my home backyard with beautiful landscape design and creative garden care techniques I develop myself.

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