Best Concentrate 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.

Grow a beautiful vegetable garden

Flowers and foliage will be stronger and more colorful

Blooms will be more plentiful, fragrant and longer lasting

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 fertilizer

Biofertilizer which contains living enzymes which, when applied to seeds, plant surfaces, or soil, colonize the rhizosphere or the interior of the plant and promotes growth by increasing the supply or availability of primary nutrients to the host plant.

Fermented worm castings, plus kelp and many organic soil amendments. Not just vermi-wash or leachate tea.

Plant boosting product that super-charges your soil.

Benefits: Makes 64,000 applications for house plants. Makes 500 gallons, Each gallon makes 128 applications Its like a full ecosystem in a bottle that is a concentrated formula for watering your plants its easy, 1. 2. 3. and your ready to go. Great for all soil and growing medias, hydroponics, semi hydro, lecca, Bavariums with reptiles, terrariums, water gardens and fish tanks, flowers and so much more. Good For Roots, Stems, Leaves, Blooms, Foliage, and over all plant health.

What is it: Fully Digested Elemental, Nutrient Supplement System for all plants. All vitamins and minerals with the microbial index are essential to a plants life. Complete Micro-fungi mycorrhizae and rhizobacteria strains, in a pH Balanced formula.

How its made: Through our Zymology process we break down the 18 ingredients into thousands of separate fully digested and readily absorbable elements. This full nutrition can take over 5 years to complete before we bottle it up for you.

Provides supplementary macro and micro nutrients. This bottle is 32 ounces of concentrate that will yield as much as 32 gallons of finished liquid fertilizer (just add water).

Tremendously beneficial for soil quality & improved rooting

Stimulates growth and improves plant health and color.

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

Use Tiger Bloom at the first sign of flowering

To extend flowering or fruiting; add Big Bloom liquid fertilizer late in the season

Formulated with a low pH to maintain stability in storage and keep micronutrients available

Miracle-Gro LiquaFeed Advance Starter Kit with Garden Feeder, 16 oz. Bottle of LiquaFeed All Purpose Liquid Plant Food, and Dosing Spoon

Miracle-Gro LiquaFeed All Purpose Plant Food Refill Pack, (Liquid Plant Fertilizer) 16 oz.

OMRI ​ORGANIC LISTED SEAWEED & KELP FERTILIZER: Liquid Kelp is a natural plant food that provides a range of benefits for plant health and growth. OMRI listed for organic use, GS Plant Foods Liquid Seaweed Fertilizer is a completely natural, seaweed extract fertilizer for plants. Our liquid seaweed will help stimulate natural root growth, mineral uptake and overall plant growth and vigor. This can be applied to any type of soil or plant without concern for waste or harmful chemicals.

ONE OF NATURE’S ‘MIRACLE’ PLANT FOODS: Made from the finest seaweed plant Ascophyllum Nodosum, this is one of nature’s miracle plant foods. Our seaweed extract greatly increases your plant’s resistance to stressors such as excessive heat, wind, drought conditions and more. The seaweed fertilizer for plants will increase the bloom set and size of flowers and fruit. It increases and stabilizes chlorophyll in plants, which results in darker green leaves and increased sugar content in plants.

OPTIMAL PLANT GROWTH & HEALTH AT HOME OR COMMERCIALLY: Used in low concentrations, kelp liquid fertilizer acts as an efficacious growth promoter. GS Plant Foods sea kelp fertilizer is used extensively on a commercial basis, as well as at home for gardeners as an organic soil conditioner. Using GS Plant Foods seaweed plant fertilizer will lead to healthier crop yields and general plant well being.

ALL PURPOSE: 10-10-10 with Amino Acids (5.5%) & Seaweed Extract is a generic liquid fertilizer designed for all stages of plant growth.

USE SITES: Great for gardens, flowers, fruits, vegetables, turf grasses etc.| Suitable for indoor & outdoor use

USAGE RATES: 1-2 oz per gallon of water (it's better to start at a lower rate and work your way up) | Water generously & continue use every 1-2 weeks

OMRI ​ORGANIC LISTED FISH AND SEAWEED BLEND: GS Plant Foods all-natural fresh fish liquid fertilizer is a high quality organic product that gives excellent plant growth, rebuilds soil, and offers higher production yields. The kelp fertilizer can be applied to any type of plants, trees, lawns, flowers, vegetables and seeds without concern for waste.

REBUILDS SOIL & IMPROVES PLANT COLOR: Our organic liquid fertilizer increases and stabilizes chlorophyll in plants, which results in darker green leaves and increased sugar content in plants. This seedling fertilizer relieves stress in plants caused by extreme weather conditions, increases plant vigor, greater resistance to heat, drought, and frost. Our organic liquid fertilizer for seedlings increases microorganisms in the soil and increases mineral uptake.

OPTIMAL PLANT GROWTH & HEALTH AT HOME OR COMMERCIALLY: Used in low concentrations, liquid seaweed fertilizer acts as an efficacious growth promoter. GS Plant Foods fish seaweed fertilizer is used extensively on a commercial basis, as well as at home for gardeners as an organic soil conditioner. Reduce herbicide use by adding our liquid kelp extract, and yet maintain the same kill effectiveness. This fish fertilizer for vegetables will lead to healthier crop yields and general plant well being.

Blended with 4% Seaweed: Liquid Sea Kelp Concentrate blended with Ascophyllum Nodosum Seaweed harvested in the Icy North Atlantic

Blended with 4.5% Humic Acid: Soil Hume is a Highly Concentrated form of Liquefied Carbon Derived from the Highest Quality Humate Source, Leonardite. Leonardite is Considered by many to be the Highest Quality form of Humic Acid

Versatile Formula for Lawn and Garden: Soil Hume Can help increase the Transfer of Nutrients and Help your Lawn, Garden and Plants Uptake Nutrients more Efficiently

100% SUSTAINABLE ORGANIC INGREDIENTS: Brewed and concentrated organically using Washington worms and black strap molasses

HIGHLY CONCENTRATED FORMULA WITH BILLIONS OF BACTERIA: Makes other fertilizers and soil more effective for plant growth

CAN BE USED ON HOUSEPLANTS, GREENHOUSE PLANTS AND OUTDOOR PLANTS

Plant fertilizer specifically formulated for indoor potted plants to ensure your houseplants thrive with deep green plant growth

Indoor plants especially house plants deserve plant food fertilizer that delivers nutrients that matter to the health of your plants. Our high concentrate 4-3-4 lasts much longer than other product

We use the highest quality ingredients to produce this liquid fertilizer for indoor plants. This house plant fertilizer contains a balanced 4-3-4 nutrient blend.

Makes Up to 12 Gallons - The 8oz bottle makes 12 gallons of ready to spray neem oil when mixed according to directions

Ready to Mix - Simply mix with water and spray. No surfactants or additional ingredients are required

Cold Pressed - Retains the integrity and original composition of neem oil in its purest form

Easy Peasy Plants' Fiddle Leaf Fig Plant Food nutrient concentrate bottle will make over 12 gallons of watering solution

Easy Peasy application instructions comes with a won't burn gurantee

Easy to add into normal watering schedule

Control fungus and disease in your garden with Captain Jack’s Liquid Copper Fungicide Concentrate!

Approved for organic gardening, this fungicide is suitable for the production of organic produce and can even be used up until the day of harvest!

Copper Fungicide effective in the control and prevention of a wide range of plant diseases. Listed common garden diseases include blight, black spot, powdery mildew peach leaf curl and more.

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.

Organic results in less than 1 week

OMRI, CDFA and WSDA listed for organic gardening; No synthetic chemicals EVER

3-3-2 NPK General Purpose liquid organic fertilizer; Formulated for lawns, vegetables, greenhouses, herbs and everything else that grows; Derived from organic fish and grain

New Package - Same Amazing Product that Plants & Customers LOVE!

EASY & ALL PURPOSE - Simply grow healthy plants and beautiful gardens... Just add directly to seed, soil, transplant roots, existing plants, or mix with normal watering. Works for everyone, every plant, everywhere, every time!

A LITTLE GOES A LONG WAY - 1/2 lb bag makes 32+ gallons or treats up to 1,000 sf of soil or plants. Provides benefits of compost and advanced nutrition that builds healthy nutritious living soil and feeds plants continuously on-demand.

OMRI listed for Organic use

Complete Plant Nutrition - All 90 macro, micro, trace, and ultra-trace mineral nutrients

More Blooms, Greener Lawns, Bigger Yeilds, and Better Tasting Plants

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.

For Healthy, Responsible and Abundant Growing

Makes up to 32 gallons depending on application

No harmful chemicals - Safe for use around children and pets

SUPERCHARGE your Air plant and Epiphyte collection with a liquid plant fertilizer specially concentrated for convenient weekly applications. Refill your fine misting spray bottle with water, follow the directions to add concentrated solution and shake! Fertilizing formula featuring 16-9-25 NPK and is gentle enough to spray directly on the plants with no mixing and measuring required! Air plants need more care then just air and a weekly spray provides the food they need.

SPOIL YOUR TERRARIUM PLANTS with nutritious food to get them growing! Special concentrated fertilizer easily mixes with with water in your spray bottle to easily gets into all the nooks and crannies making fertilizing application a breeze. Spray bottle makes quick work of watering jellyfish and hanging glass terrarium air plant displays so your plants are healthy and stylish too.

SAVE MONEY by purchasing mini juvenile air plants and grow them into large specimens yourself with optimum care. Nourishing plant food will hydrate your tillandsia air plant assortment and help them reach their peak size as well as encourage pup development and clumping so you aren't just growing your specimens, you're expanding your collection.

[Long Lasting, Less Work] - An easy one time granular application can feed your potted indoor or outdoor houseplant for several months, with all of the Nutrient release happening only when you water.

[Light Feeding Rate] - Our Balanced ratio of nitrogen, phosphorous, and potassium (NPK) will never over concentrate in the potting soil of your live succulent plants. It will feed your arid loving plants the optimal amount to insure healthy root development, Vibrant Colors, sturdy stem growth, and could contribute to bloom growing.

[Professionally Formulated]- This Blend contains balanced micronutrient and mineral ratios that are perfect for many succulent and cactus varieties like Jade, crown of thorns, lithops, pilea, snake plants, echeveria, aloe vera, string of pearls, and more.

🌿 VIBRANT GROWTH — Fertilizing Your Bonsai Plant Leads to More Growth, AND a Deeper Colors

🍎 HEALTHY PLANTS — Filled With Essential Nutrients that Your Bonsai Tree Needs to Stay Robust And Strong

👨‍🍳 SPECIALLY FORMULATED — NPK and Application Instructions Are Specific To Containerized Conifers, Maples, Evergreens and More

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

THE #1 ALL-NATURAL ORGANIC PROBIOTIC for your plants and soil is finally here to improve texture and drainage for soils, while promoting growth for your plants, flowers, trees, shrubs, and garden. PLEASE NOTE the expiry date on the bottle. It is usually 6-9 months from the shipping date

IMPROVE WATER QUALITY IN YOUR PONDS AND AQUARIUMS with our non-toxic and safe EM-1 microbial inoculant. This non-GMO and easy-to-use probiotic inoculant will effectively enhance water quality thanks to its effective live microorganisms.

1 MILLION COLONY-FORMING UNITS OF LACTIC ACID BACTERIA will help eliminate foul odors (pet, smoke, garbage or paint smell) while conditioning your soil for organic lawn care.

Starter solution for new plantings and transplants

For root growth, reduces transplant shock

Active Ingredients: Phosphate, Chelated Iron, Derived From Phosphoric Acid, Ferric Edta