Best Hydroponic Garden Fertilizers in 2026

Get your garden going with FoxFarm Grow Big, our liquid concentrate fertilizer that supports lush vegetative growth.

FoxFarm Big Bloom Liquid Plant Food is formulated for use on all plants and can be used every time you water. OMRI Listed and Registered CDFA Organic Input Material.

FoxFarm Tiger Bloom is a phosphorus fertilizer that contains nitrogen to support vigorous growth. FoxFarm Tiger Bloom is designed to encourage abundant fruit, flower and multiple bud development.

Product 1: General Hydroponics FloraGro 2-1-6 delivers nutrients for structural and foliar growth

Product 1: Combine FloraGro 2-1-6 with FloraMicro and FloraBloom to create a nutrient mix tailor-made for your plants and their phase of growth (seedling, cutting, structural, flowering, or fruiting)

Product 1: Ideal for hydroponic applications and as a nutrient supplement for potted plants

Grow stronger, healthier plants, with denser root systems and bigger crop yields.

Professional strength soil microbe superpack. Loaded with Mycorrhizae, Trichoderma, and billions of other beneficial soil microbes.

Works great for indoor and outdoor gardens. Use it on all your plants, crops, and trees; perennials and annuals.

AZOMITE has been shown to improve root systems, yields and general plant vigor in a variety of applications; from field crops and orchards to lawn and garden use. AZOMITE helps remineralize nutrient-depleted soils. 100% naturally derived, AZOMITE is OMRI listed for use in organic production and farming.

Organic Trace Mineral Powder w/ 67 Essential Minerals for Your Garden Bulk Fertilizer Powder-Be Green and Grow Your Own Food. Great for blending into soil mixes, hydroponic systems, Irrigation System Injection with Agitation, Greenhouse Potting Soil, Fertilizer, Home Gardens, Potted Plants

Improves root systemsMicronized is a powder with flour-like consistency, where 90% of the particles will pass through a 200-mesh screen., yields and plant health

Botanicare Pure Blend Pro Bloom Soil 1-4-5 is a premium, one-part plant food for fruiting and flowering plants

Beneficial for fruits, flowers, vegetables, houseplants, shrubs, and succulents

Use this nutrient during the bloom phase with every watering

Wholly Mackerel provides immediately available nutrition to support vigorous growth

Bush Doctor Wholly Mackerel is a liquid plant nutrient derived from fish.

Kelp Me Kelp You Our product is a liquid concentrate that can be used for growing fruits, vegetables, gardens or flowers

MasterBlend 4-18-38 Master Kit (3 Separate Components in correct amounts)

Contains MasterBlend 4-18-38, Calcium Nitrate 15.5-0-0, and Epsom Salt (Magnesium Sulfate)

Used by professionals worldwide for optimum plant growth

A trio of high-octane fertilizers: open Sesame, beastie blooms and cha ching.

Achieve Bumper crop harvests by utilizing all three soluble products at first bud development. Begin feeding with open Sesame for early flowering, beastie blooms for bud density during mid-flowering, and finish with cha ching for essential oils and to pump out heavy resins.

Invite the whole family over. We designed our soluble to work together as part of a sequential feeding schedule for hydroponic and conventional growers.

Formulated to achieve large, dense and heavy harvests with more essential oil and resin content. That means more good looking, valuable crops for you.

TREATS 800 GALLONS OF WATER! Try Flower Fuel Today for Big and Heavy Harvests!

DO NOT BE FOOLED by other companies selling you dead Mycorrhizae powder in a bag. Every bag of Myco Supreme Premium Mycorrhizal Fungi comes alive, fresh, and super potent…GUARANTEED. Order Now With Confidence that you are getting what you pay for.

20X MORE CONCENTRATED than leading brands: Total ACTIVE Microbe Rhizophagus Irregularis…..50 Spores/g *Equivalent up to 5000 propagules per gram and 141,000 propagules per oz. This is 20 times more than leading brands in the marketplace.

HIGH PERFORMING Mychorrizal Fungi Trifecta Myco Supreme utilizes bio-encapsulated spores of the carefully selected and versatile Rhizophagus Irregularis mycorrhizae strain. Known for versatility and effectiveness.

SOURCE OF CALCIUM MAGNESIUM & CHELATED IRON: Many varieties of flowering plants require higher levels of these micronutrients. Our well-balanced formula is designed to specifically address any plant deficiencies that may be present.

CORRECTS COMMON PLANT DEFICIENCIES: Sometimes an unhealthy plant may be suffering from a nutrient deficiency or even too much of one nutrient. Our CalMag & Iron supplement effectively corrects and remedies these micronutrient plant deficiencies.

NUTRIENT UPTAKE AND ABSORPTION: This formulae efficiently supports nutrient uptake and absorption by addressing any plant deficiencies in the first place, thus successfully supporting the vegetative and flowering stage of your plants.

STRONG ACID AND BASE FOR SUPERIOR PH STABILITY: Bloom City pH Down and Up are strong pH adjusting agents that help the home grower maintain optimal pH levels. Formulated with the highest grade pH adjusting formulas

WORKS IN ALL ENVIRONMENTS: Designed for hydroponics systems, soilless mediums (eg: coco coir and peat), and soil gardens

SAFE TO USE FOR ALL PLANTS: Add to every watering to adjust pH to the desired level, for soil usually aim for a pH of 5.8-6.2, it’s that easy

Soluble plant food of potassium derived from potassium sulfate

Use for horticultural purposes to improve overall plant vigor and growth

Use during the entire life cycle of the plant

OMRI-rated, all-natural, cold pressed, 100% organic fish fertilizer adds proteins and enzymes to soil

Concentrated, high-energy soil nutrient broth creates better lawns, crops, or gardens

Trident's Pride cuts down on chemical fertilizers while increasing anti-oxidants, sugar, and earthworm population

HUGE GROWTH: Photosynthesis Plus is formulated to grow massive fruits, vegetables, and herbs; As an all-natural liquid supplement, it maximizes the plant’s ability to use available light, allowing for larger blooms and more flavorful yields

FAST GROWTH: This unique formula enhances the photosynthesis process by enabling the plant to utilize more of the available light, increasing the conversion of CO2 into carbohydrates; This will help the plant grow faster due to the increased energy intake

MORE GROWTH: Photosynthesis Plus fixes nitrogen at the foliar and root zones; It builds biofilms around the root and through the solid/growth media to help protect roots and allow for more growth of the plant by increasing nutrient availability and uptake

Superior water-storing properties

Pure mineral without fibers or solvents

Coarse pored and aerate expanded clay

ORGANIC PLANT FERTILIZER: GS Plant Foods Ocean Magic Sea Minerals works as a soil fertility supplement that re-mineralizes the soil. Ocean Magic is derived from extremely clean sea water. This ocean fertilizer contains all the minerals in the same proportions that those same minerals occur in the blood of healthy animals. Anyone who wants to optimize their garden and improve the mineral content of their soil and vegetation can do so by applying Ocean Magic.

WATER-BASED SPRAY SOLUTION: This mineral fertilizer is 100% water-soluble in contrast to rock powders which are not. Ocean Magic Sea Minerals is helpful to all types of soil and any growing conditions. GS Plant Foods sea fertilizers will produce major improvements in your plant’s growth (volume) and will improve the nutrient value and taste of food products you grow. Our ocean minerals liquid fertilizer is powerful enough for outdoor plants but gentle enough to not burn indoor plants.

SPRAY ON ALL PLANTS OR CROPS: GS Plant Foods Ocean Magic Sea Minerals is a high quality organic fertilizer that gives excellent plant growth. GS Plant Foods liquid plant fertilizer can be applied in your lawn and turf, fruits, vegetables, gardens, and house plants without concern for waste or harmful chemicals. GS Plant Foods house plant fertilizer greatly benefits the development of the plant’s root system, resulting in stronger, healthier plant, enabling growth and nutrient uptake.

PREVENTS PLANT SHOCK: Our Vitamin B1 and Plant Rooting Hormone prevents transplant shock and stress from nutrient deficiencies and other environmental variables. This plant tonic provides your plants with B1 vitamins and rooting hormone to maintain healthy plant growth. It can also be used for cuttings and with all planting mediums.

IMPROVES PLANT GROWTH: Hormex Vitamin B1 root stimulator for plants promotes deeper, stronger roots and stems while increasing foliage growth. This plant growth hormone concentrate can be easily transported from the soil up into the roots of a plant, where it plays an essential role in photosynthesis.

FOR ALL GROW MEDIUMS: Our liquid outdoor and indoor plant growth stimulator can be used with all plant varieties, lawns and gardens. Works with all propagation methods, and grow mediums including hydroponic and aeroponics, for accelerated growing success.

RAW Nitrogen is a macro element, in that it is essential nutrient for vegative growth and development. Nitrogen is the N in N-P-K ratios found on most fertilizers. RAW Nitrogen can easily and quickly solve nitrogen deficiency issues as it is immediately available to be taken up by the plant.

Easily mixes into water and is completely soluble.

BENEFITS: Great for treating individual deficiencies. The primary component in overall plant development. Essential for production of Chlorophyll, Amino Acids, and Enzymes

It is a piece of nature in a bottle: Fish Head Farms Organic Soil Conditioner makes fruits, herbs and vegetables healthier, taste and smell better and it improves plant health, growth and production. It will make your plants smile and your gardens thrive.

A living product: It is OMRI listed for organic use and University tested. It provides a complex Microbial profile that includes thousands of different species of bacteria, fungi and protozoa. This profile is closer to a natural ecosystem than anything you will find on the market.

Increases yield: Fish Head Farms Organic Soil Conditioner increases plant production by up to 20%. Can be used for organic farming, soil or soilless and hydroponic gardening.

The ultimate flowering phase additive. Just add it to your reservoir during reproductive growth, usually weeks 3-7, and watch your flowers swell and sweat.

Not only a PK booster but also a nectar secretion agent. It will push your plant to bloom as heavily as your environment will allow.

Contains phosourous compounds called phosphites.

RAW Enzymes are a proprietary blend designed to clear away problems that may occur in the root zone of plants. Unlocking minerals that are otherwise unavailable to the root system.

Tech Grade and completely water soluble allows for easy cleaning of foliar equipment and emmiters

Excellent way to flush at the end of your grow cycle and clear feeding lines of unwanted fertilizer build up.

Grow big Hydro delivers a full spectrum of micro nutrients

This nutrient solution emphasizes the maximum genetic growth; flowering; and fruiting characteristics of each plant

Grow big Hydro set the standard for quality results

2-PART NUTRIENT PACK - Two bottles is all you need from start to finish of your grow cycle! No need for complex nutrient schedules

PRIME NUTRIENT BLEND ensures maximum absorption for your plants - thanks to scientifically formulated Iron (Fe) chelated with DTPA

ULTRA CONCENTRATED - A little ENVY goes a long way; offering Greenhouse Grade nutrients for abundant harvests.

For fruiting and flowering plants.

Contains earthworm castings, bat and seabird guano.

Easy to use! Just mix with water and broadcast lightly around roses, or in flower beds.

CORRECT & PREVENT DEFICIENCIES: Feed CalMag Pro Formula to your plants as needed to prevent and correct common deficiencies such as blossom end rot and upward leaf curl.

CALCIUM, MAGNESIUM, IRON & MICRO-NUTRIENT SUPPLEMENT: CalMag provides plants with calcium, magnesium, iron, and micro-nutrients which are key components in many plant functions such as photosynthesis and absorption & transport of nutrients within the plant, and are vital to the healthy development of all varieties of plants.

VERSATILE FORMULA: Can be fed to all varieties of plants growing in almost any type of garden such as hydroponic, soil, aeroponic, and all soil-less media! Blue Planet Nutrients CalMag Pro Formula can be used along with other garden fertilizers and supplements.

Tiger Bloom

Nutrients: 2-percent nitrogen, 8-percent phosphorus, 4-percent potassium

Fast-acting, high phosphorus fertilizer with nitrogen

Made in United States

Package length : 6.0"

Package width : 6.0"

Inorganic & Sterile Growing Medium, great for Rooting Cuttings clone plants, germination start seeds and more. Encourages Faster Initial Rooting & Its Firmness Is Guaranteed

Much easier than starting in soil! Predrilled planting holes make seeding and plant propagation a breeze. Great for hobby and commecial growers

Provides 20% Air Space When Saturated - Absorbs nutrient solution while retaining plenty of oxygen for rapid root growth!

GREEN BRIGHT LETTUCE: Greenway Biotech lettuce fertilizer has an ample supply of chelated micronutrients, ensuring that your heads of lettuce are bright green, full and delicious.

100% WATER SOLUBLE: This type of hydroponics fertilizer comes in a powdered form and is designed to dissolve quickly in water. Gardeners can stir it into the water in a watering can or fill a garden hose dispenser and spray a large area of plants.

PREMIUM INGREDIENTS: This vegetable fertilizer professionally formulated with quality ingredients and Contains 8% Nitrogen, 15% phosphorous, 36% potassium, boron, copper EDTA, iron EDTA, manganese EDTA, zinc EDTA, and molybdenum, results are distinct & visible