Best General Hydroponics Hydroponic Nutrients Additives 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.

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.

Liquids to stabilize nutrient pH in hydroponics

Includes pH Up and pH Down 1 qt. bottles

pH Up: base solution formulated with potassium carbonate

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

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.

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

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

PREMIUM POTASSIUM SILICATE-BASED PRODUCT: Tree Trunk features advanced nutrients that will help the plants natural ability to strengthen its cell walls, resulting in thicker stalks and better branch development, as well as abiotic stress tolerance!

PLANT STRENGTH: Watch your plants grow by applying Tree Trunk liquid fertilizer. Hydroponic nutrients make our product suitable as quality indoor plant food.

ABIOTIC STRESS TOLERANCE: Tree Trunk is needed to ensure yield stability under abiotic stress and minimizes the environmental impacts on crop production.

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

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.

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.

Made in United States

Package length : 6.0"

Package width : 6.0"

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

Purpinator is a liquid plant food formulated to provide nutrients to aid in root growth while enhancing plant vigor and yield.

Improves the expression of phenotypic characteristics, such as purple coloration.

Provides nutrients that help improve the production of oil-producing glands.

[Balanced Nutrition] The FAFAGRASS organic based hydroponic nutrients provide a balanced nutrition that promote growth for both indoor and outdoor plants.

[Professional Formula] The 0.26gal hydroponic nutrients are a composition of Nitrogen (5%), Potassium (5%) and calcium (1%). Out of these elements, Nitrogen is for the growth of leaves and blades, while Potassium fertilizer can promote the growth of plant stems, flowering, and fruiting.

[Easy to Use] Simply prepare a measuring cup, mix 4ML or 5ML of nutrient solution with 1L of water, stir, and apply directly to your hydroponic machine for plant nutrition.

🌿 All natural general purpose plant food – BudJuice Micro is a perfect alternative to synthetic fertilizers, providing your indoor and outdoor fruit and vegetable garden with essential nutrients. It excels at producing large yields and aids in flower growth. Certified organic BudJuice incorporates the power of natural fertilizers, ensuring that your plants receive the nourishment they need for robust growth and abundant blooms.

🌿 All natural general purpose plant food – BudJuice Micro is a perfect alternative to synthetic fertilizers, providing your indoor and outdoor fruit and vegetable garden with essential nutrients. It excels at producing large yields and aids in flower growth. Certified organic BudJuice incorporates the power of natural fertilizers, ensuring that your plants receive the nourishment they need for robust growth and abundant blooms.

🌿 Sustainability – BudJuice not only promotes organic gardening but also contributes to sustainable practices. We are committed to reducing our environmental impact, and by purchasing our product, you directly help to remove plastics from our oceans. With BudJuice, you can nourish your plants while also making a positive difference for our planet.

Cannaboost is canna's powerful flowering stimulator. Specially developed for fast growing plants, it improves quality and increases yields

Canna rhizotonic is a powerful, algae based, vegetative stimulator for roots of fast-growing plants that already have roots or root initials

Cannazym is a high-quality enzyme product. It consists of more than 12 different kinds of enzymes to which vitamins and extracts of desert plants are added. Cannazym speeds up the process of breaking down dead root material

Specialized Nutrients for Structural & Foliar Growth: Natural Hydroponics 216Grow provides the specialized nutrients plants need for vigorous, rapid activity during the structural and foliar growth phases.

NPK 2-1-6 - With a Guaranteed Analysis of 2% Nitrogen (N), 1% Phosphorus (P), 6% Potassium (K), 216Grow is derived from highly purified ingredients (including Magnesium), concentrated to the limit of solubility, to ensure consistent availability in all environments and mediums.

Quality Primary Ingredients & No Artificial Colors! 216Grow is ideal for hydroponic applications as well soil, coco coir, and other growing media.

COMPLETE PLANT GROWTH FERTILIZER: The A&B nutrients are load with all 11 essential and necessary elements and minerals for plants’ healthy and prosperous growth, such as iron, calcium and magnesium, etc.

COMPATIBLE WITH ALL GROWING MEDIUMS: Our BASE AB is fully compatible with QYO Hydroponics System, as well as other brand hydroponics. Moreover, it is suitable for all grow mediums, widely used for indoor plants, aquaponics, and coco coir cultivations.

FOR ALL PLANTS: Base nutrients are the building blocks of all plant life, which can work on all plants, trees, flowers, bushes, and lawns. No pesticide or herbicides, safe for plants, people and pets.

Canna rhizotonic is a powerful, algae based, vegetative stimulator for roots of fast-growing plants that already have roots or root initials

Cannazym is a high-quality enzyme product

Canna is the dutch expert in cultivating your favorite plants in cocoponics, hydroponics and potting mixes

A select blend of L-amino acids specifically chosen for each of their beneficial effects on plant growth

Enhances the bloom stage of any plant by stimulating the natural production of ethylene

Dark Energy is a select blend of L-amino acids, specifically chosen for each of their beneficial effects on plant growth

UNLOCK MAXIMUM GROWTH POTENTIAL: High nitrogen and phosphorus concentration from seabird guano, along with other minerals, will give your plants all the nutrients they need for maximum development

IMPROVES ROOTS AND SOIL QUALITY: Perfect for all growth stages, from early vegetative to flowering and flush; Improves roots and soil quality to enhance your flowers, fruits, vegetables, and ornamentals

MULTIPURPOSE USE: Can be applied to all types of indoor, outdoor, and hydroponic plants; Use the fertilizer as a highly effective compost tea or soil dressing mix

Usable throughout growing and flowering cycle

Safe for many fruiting and flowering plants and shrubs

Package Weight: 2.3 lbs

Boost Soil Quality & Plant Yield - Get the garden you've always dreamed of! Our liquid plant food contains a blend of humic acid and fulvic acid that can help condition the soil and promote root growth.

Care For Your Garden Naturally - Our organic liquid fertilizer is OMRI certified. It's perfect for organic farmers and those who want to use natural fertilizers for their lawns or flower gardens.

Multiple Ways To Apply - This organic soil conditioner can be used on its own, or mixed with water and other soil additives. Our organic fertilizer can be applied via sprayers or hydroponic setups.

🌿 GROW HEALTHIER PLANTS - Improve the growth and health of your crops by reducing nutrient friction while using less products. Strive hydroponic nutrients increases yields as much as 20-40% by eliminating hidden nutrient blockages.

🌿 INCREASE TERPENES — Get 8-12% higher terpene production by using optimal nutrients. Our two part nutrient mix provides your plants with the right nutrients for each stage of the growing cycle to help increase size, health, and crop quality.

🌿 WORKS WITH ANY PLANT & SYSTEM - Enhance the nutrient uptake of any plant grown in hydroponic, greenhouse, and indoor or outdoor soil. Give your plants the best hydroponic nutrients to help them grow.

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Complete Plant Growth Fertilizer: The A+B nutrients are load with all 11 essential and necessary elements and minerals for plants'healthy and prosperous growth, such as iron, calcium and magnesium, etc.

Compatible With All Growing Mediums: It is suitable for all grow mediums, widely used for indoor plants, aquaponics, and so on.

For All Plants: Base nutrients are the building blocks of all plant life, which can work on all plants, trees, flowers, bushes, and lawns. Safe for plants, people and pets.