Best Organic 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.

FEED YOUR PLANTS: Burpee's All-Purpose Organic Plant Food is formulated to keep your plants growing and happy throughout the season. Major nutrients as well as calcium, minor nutrients, and some of the beneficial microbes that help keep the soil and plants healthy are released immediately and continue to feed your plants for up to 3 months.

FOR VEGETABLES, FLOWERS & HERBS: Use this natural plant food for seed starting, bedding plants, vegetable gardens, trees, shrubs and flower containers. OMRI labeled organic. The custom blend promotes plant growth and more blooms! Great for indoor or outdoor plants.

ORGANIC CERTIFIED: OMRI listed for organic gardening use, this plant food safely keeps your soil and plants as healthy as they can be. Easy to apply granules release essential nutrients and deliver fast-acting results for all types of plants in your home garden. Follow instructions on the bag for how much plant food to apply.

Grow a beautiful vegetable garden

Flowers and foliage will be stronger and more colorful

Blooms will be more plentiful, fragrant and longer lasting

Perlite

Helps loosen heavy soils and prevent compaction

Aerates soil and promotes root growth

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

Ideal for recharging soil and container growing. For brewing compost tea, we recommend using VermisTerra Premium worm castings.

Macronutrients, micronutrients, trace minerals, natural plant hormones. Boosts growth of roots, leaves, flowers and fruit.

Pure worm castings, less water weight; easier to mix, apply, and spread.

Down To Earth Rose & Flower Mix is a one pound box of all natural fertilizer with 4-8-4 formula and supplies nutrients for vigorous growth and sensational flowers

A special fertilizer blend that provides ample nitrogen for vigorous growth, extra phosphorus for beautiful blooms and potassium and trace elements for healthy plant stock

Great for starting edible bulbs, like garlic and onion, apply when planting your favorite new roses, bulbs, perennials and use throughout the season when new growth appears on existing plants

PROMOTES ROOTING: Rooting hormone grows new plants from cuttings.

GROW CUTTINGS: Works with most popular home, garden and greenhouse varieties.

ROOT NEW FAVORITE PLANTS: Helps African violets, roses, poinsettias, philodendrons, geraniums, coleus, woody ornamentals and more grow from cuttings.

PURE EARTHWORM CASTINGS – Wiggle Worm Soil Builder is pure castings, not vermicompost, because of our special manufacturing and harvesting process. It’s not uneaten worm bedding with some worm castings, so it’s pure, nutrient-rich, and mineral-dense.

IMPROVES SOIL STRUCTURE–Wiggle Worm Pure Worm Castings contain tiny, football-shaped particles that prevent packing to help improve plant soil aeration. Our soil supplement also helps improve the root’s water retention capacity.

NATURAL INSECT REPELLENT – Aside from providing nutrients to the soil, Wiggle Worm Pure Worm Castings can also help control the population of plant pests such as whiteflies, spider mites, and aphids.

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.

BENEFITS: Makes 6400 applications for house plants. (Makes 50 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.

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

Botanicare Hydroguard assists in the decomposition of organic matter in hydroponic gardening

Contains bacillus, a natural bacterial root inoculant

Helps convert organic matter into nutrients that may be absorbed directly by the roots of a plant

Feed all bulbs, tubers, corms and rhizomes

Made with 100% organic and natural ingredients

Superior blend of fish bone meal, alfalfa meal, feather meal, soft rock phosphate and mined potassium sulfate

Nobody likes blossom end rot or tip burn.

That’s why FoxFarm brings you BUSH DOCTOR CAL-MAG.

Calcium and magnesium help strengthen cell walls and aid in fruit development, helping you avoid the costly and frustrating deficiencies that cause these problems.

Natural Product - Composed of 2lbs of 100% ground freshwater diatomaceous earth with absolutely no additives or fillers

OMRI Listed - Listed with the Organic Minerals Research Institute, a non-profit organization that reviews products against organic standards.

Supports a Great Cause - Harris donates 10% of profits to support the local Etowah Valley Humane Society.

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.

- WORM CASTINGS ORGANIC FERTILIZER – Eden’s Best worm castings are as close to 100% castings as you can get. Check out our reviews to see why our products are chosen over others.

- 100% ORGANIC – Certified and guaranteed! Our organic fertilizer for vegetable gardens, flower gardens, potted plants, and general soil builder is 100% organic and we’re proud of it!

- GROW NATURALLY – No more worrying about the harmful side effects of chemical pesticides and fertilizers. Eden’s Best earthworm castings allow you to grow flourishing plants naturally, the way nature intended.

Bio Thrive grow provides plants with essential nutrients for roots, stems and foliage

Ideal for all types of plants

Can be used with garden soils as well as potting mixes

Uses trace minerals and micronutrients naturally derived from fish

Promotes vigorous growth of plants and vegetables

Great for all indoor and outdoor plants

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.

LIGHT APPLICATIONS - A balanced mix of essential nutrients with low NPK rates to gently feed your live cacti and succulents. Aids and enhances root development, color vibrancy, beautiful bloom, and stem growth in both plant types.

LASTS LONGER, FOR LESS - Easy, ready to use granular formula feeds your plants consistently for 9 months! Simply poke holes or sprinkle around your pot mix, water, and watch your succulent/cactus thrive! Perfect for pots with pumice, pebbles, gravel, perlite, and other organic potting soil mixes.

LIQUID ALTERNATIVE - Excellent alternative to liquid fertilizer in a spray bottle. Great for houseplants that need consistent nutrition year round but less watering.

CONTAINS MORE MICRONUTRIENTS THAN ANY OTHER BRAND: Iron (Fe), Zinc (Zn), Boron (B), Copper (Cu), Manganese (Mn), Molybdenum (Mo), Sulfur (S)

BIOACTIVATED FORMULA FOR OPTIMAL NUTRIENT UPTAKE: Calcium and magnesium, Micro-chelated with fulvic acid; if you google it you’ll see why that’s good

PREVENTS COMMON GROWTH DEFICIENCIES: Apply Cal-Mag in every stage of growth for strong stalk and leaf health. Apply with every watering for the full benefit

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.

Product 1: No mixing or measuring

Product 1: No chemical runoff

Product 1: No chemical runoff

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

FROM SUSTAINABLE ALASKAN SALMON:  Great for Soil and Plants, for indoor and outdoor use.

CONTAINS SALMON EMULSION AND SALMON OIL: Very high in omega 3 Fatty Acids for Plants. More Amino Acids than any other brand.

SMELLS LIKE FISH: You know this is the good stuff, because is really really smells like ocean and fish.

Product 1: Pre-measured fertilizer spikes nourishes at the roots; Time release fertilizer for all fruit and citrus trees

Product 1: Easy to use fertilizer spikes; No wasteful runoff, no mess, hazards or smells; Apply early spring and late fall

Product 1: Continuous supply of nutrients below the surface, where the active roots are growing

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

Garden Care organic fertilizer

Contains all 15 growth elements needed to produce vigorous, healthy turf

Golf courses use any time of Year because it is so safe