Best Organic Garden Fertilizers of 2025

Burpee Natural Purpose Granular 4-Lb Organic Food is an all-purpose plant food that provides essential nutrients, calcium, and beneficial microbes to keep your plants healthy and growing all season long. It's perfect for vegetable gardens, flower gardens, herbs, trees, shrubs, and containers. The organic formula promotes plant growth, fruit production, and vibrant blooms, making it a natural fertilizer for your best garden.

Jobe's Organics Vegetable & Tomato Granular Fertilizer is a fast-acting, organic granular fertilizer that helps you achieve a more abundant harvest of vegetables and tomatoes. The product contains Jobe Biozome, a unique, extremely aggressive proprietary microorganism archaea that helps break down complex hydrocarbons and minerals into basic nutrients and trace elements that plants readily absorb. Using this fertilizer improves the long-term soil quality of your garden, increases root mass, and helps your garden resist disease, insects, drought, and other unfavorable conditions within a growing season. The easy pour bag is convenient to use, and the product is OMRI listed for organic gardening by USDA, which means no synthetic chemicals and is safe for use around children and pets.

Espoma Organic Garden-Tone 3-4-4 Organic Fertilizer is a natural and organic fertilizer that is perfect for leafy vegetables like lettuce, kale, and cabbage, as well as warm season crops like tomatoes, peppers, squash, and melons. It contains a rich blend of natural and organic ingredients with 5% calcium for a more abundant and flavorful harvest. It is environmentally safe and requires no mixing. This organic fertilizer is approved for organic gardening and is made in the USA.

Brut Worm Castings provide an excellent boost for your garden. With premium organic ingredients, this fertilizer ensures your plants receive the essential nutrients they need to thrive, whether indoors or outdoors. Made in-house at Brut Worm Farms, these castings guarantee purity, giving you confidence in what you apply to your soil. You'll notice the difference as your plants flourish and yield more bountiful harvests. As a family-owned business, Brut takes care to nurture your plants just as they would their own, making this product a trusted choice for every gardener.

Espoma Organic Grow! Liquid Concentrate Plant Food is an all-purpose fertilizer that can be used for both indoor and outdoor plants. With its natural proteins, kelp extracts, and humic acids, this liquid concentrate provides essential nutrients to promote healthy growth. The fertilizer analysis of 2-2-2 ensures a balanced formula without any sludges or toxic ingredients. For convenient use, simply mix with water as directed and apply to your plants every 2-4 weeks throughout the growing season. Espoma Organic Grow! is approved for organic gardening, meeting all the requirements for organic production. Made in the USA by the Espoma Company, a leader in natural organics since 1929.

Smart Grower Fertilizer is an organic plant food designed to promote rapid growth and health in your plants. Unlike many fertilizers, it contains only natural ingredients, ensuring safety for both you and your plants. The included scoop makes application straightforward, so you can easily measure the right amount for your houseplants or vegetable garden. Enriched with beneficial bacteria and essential nutrients, this fertilizer enhances soil health and boosts nutrient uptake, creating a thriving environment for your plants. Whether indoors or outdoors, you can trust Smart Grower to deliver impressive results.

Give your plants the vital nutrients they need to produce bigger harvests with Miracle-Gro Performance Organics Edibles Plant Nutrition Granules. This OMRI listed plant food is perfect for feeding your tomatoes, vegetables, herbs, and fruits. Made with organic and natural ingredients, you can enjoy Miracle-Gro results without any synthetic chemicals. Simply reapply every 4-6 weeks and water regularly for the best results. With a coverage of up to 220 sq. ft., your plants will thrive and produce abundant, delicious crops.

The Down to Earth Organic Vegetable Garden Fertilizer is an all-natural, versatile mix that can help your vegetable plants grow throughout the season. Its 4-4-4 formula is perfect for your sprightly spring greens, summer tomatoes, and favorite fragrant herbs. This five-pound box of granules is full of powerful nutrition to give your plants a superpower. Use it in your backyard gardens and hobby farms for an excellent start to a bountiful harvest.

Jobe’s Organics Granular Fertilizer is a fast-acting, certified organic fertilizer that is perfect for all your gardening needs. Whether you're growing flowers, vegetables, shrubs, trees, or plants, this fertilizer will provide the nutrients they need to thrive. It is made from organic ingredients and is free from synthetic chemicals, making it safe for organic gardening. The easy pour bag and resealable packaging make it convenient to use and store. With an analysis of 4-4-4, this fertilizer provides a balanced blend of nutrients to promote healthy growth and vibrant blooms. Give your garden the nourishment it deserves with Jobe’s Organics Granular Fertilizer.

AgroThrive All Purpose Organic Liquid Fertilizer is a 3-3-2 NPK General Purpose liquid organic fertilizer that is derived from organic fish and grain. It is produced by The Progressive Digestion Process which breaks down all organic ingredients down to a simple molecular structure plants can quickly absorb. The fertilizer activates soil and helps nutrient release, promoting vigorous root and foliar growth and improving plant disease resistance. It is a convenient liquid concentrate in a bottle that just needs to be mixed with water and applied to soil. The product is OMRI, CDFA, and WSDA listed for organic gardening, with no synthetic chemicals ever used.