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Organic Fertilizers

10 Best Organic Fertilizers 2025 in the United States

#1

Winner

9.7 score

Miracle-Gro Water Soluble All Purpose Plant Food, Plant Fertilizer for Indoor or Outdoor Plants, Roses, Flowers, Houseplants, Vegetables and Trees, 10 lb.

6%OFF

Miracle-Gro Water Soluble All Purpose Plant Food, Plant Fertilizer for Indoor or Outdoor Plants, Roses, Flowers, Houseplants, Vegetables and Trees, 10 lb.

Miracle-Gro

9.7 score

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Miracle-Gro Water Soluble All Purpose Plant Food is a versatile, user-friendly fertilizer suitable for various plants, including indoor and outdoor plants, roses, flowers, houseplants, vegetables, and trees. With a significant 10 lb. container, it is designed to cover approximately 4,000 sq. ft. of garden area. This product claims to grow bigger, more beautiful plants compared to those unfed, thanks to its nutrient-rich formula that starts working instantly.

#2
9.4 score

Down to Earth Organic Vegetable Garden Fertilizer 4-4-4, 5 lb

12%OFF

Down to Earth Organic Vegetable Garden Fertilizer 4-4-4, 5 lb

Down To Earth All Natural Fertilizers

9.4 score

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The Down to Earth Organic Vegetable Garden Fertilizer 4-4-4 is a well-rounded option for anyone looking to support their vegetable garden with natural, eco-friendly nutrients. Its balanced 4-4-4 NPK ratio makes it versatile, providing equal parts nitrogen, phosphorus, and potassium to promote strong roots, healthy foliage, and productive fruit development. The fertilizer is made from all-natural ingredients, ensuring that it is free from synthetic chemicals and is safe for beneficial insects, pollinators, pets, and the surrounding environment.

Rating
9.4
Nutrient Content (N-P-K Ratio)

Most important from
3425 reviews

Nutrient Content (N-P-K Ratio)
Recommended by horticulturalists, this product stands out for its solid nutrient content, contributing to healthy buds and blooms.
#3
9.1 score

Dr. Earth Organic 5 Tomato, Vegetable & Herb Fertilizer Poly Bag

Dr. Earth Organic 5 Tomato, Vegetable & Herb Fertilizer Poly Bag

Dr. Earth

9.1 score

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Dr. Earth Organic 5 Tomato, Vegetable & Herb Fertilizer is a solid choice for gardeners seeking a natural way to boost their vegetable and herb growth. It offers a balanced nutrient supply with optimum levels designed to support healthy plant development without relying on synthetic chemicals. The fertilizer is made from 100% organic and natural ingredients, avoiding GMOs, chicken manure, or sewage sludge, which is reassuring for those wanting a clean, organic option. It also contains beneficial soil microbes and multiple strains of mycorrhizae, which help improve nutrient uptake and drought tolerance, supporting stronger plant performance.

Rating
9.1
Nutrient Content (N-P-K Ratio)
Source of Organic Matter
Release Rate

Most important from
8160 reviews

Nutrient Content (N-P-K Ratio)
The fertilizer delivers outstanding plant growth and abundant fruit without the need for chemical supplements or additional feeding.
Source of Organic Matter
Its organic formula is safe for pets and wildlife, providing peace of mind while promoting healthy vegetable and herb gardens.
Release Rate
Users appreciate the gradual feeding action of the granules, which sustains plant health over several months with minimal reapplication.
Application Method
Application is straightforward—just mix in during planting or scratch into the soil mid-season for continued nourishment.

Top 10 Best Organic Fertilizers 2025 in the United States

#1

Winner

9.7 score

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Miracle-Gro

Miracle-Gro Water Soluble All Purpose Plant Food, Plant Fertilizer for Indoor or Outdoor Plants, Roses, Flowers, Houseplants, Vegetables and Trees, 10 lb.

Release Rate: Instant
Application Method: Watering can or Garden Feeder

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6% OFF

Chosen by 1345 this week

#2

9.4 score

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Down To Earth All Natural Fertilizers

Down to Earth Organic Vegetable Garden Fertilizer 4-4-4, 5 lb

Nutrient Content (N-P-K Ratio): 4-4-4
Source of Organic Matter: all-natural
Release Rate: slow-release
Application Method: granular, apply directly or mix

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12% OFF
#3

9.1 score

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Dr. Earth

Dr. Earth Organic 5 Tomato, Vegetable & Herb Fertilizer Poly Bag

Source of Organic Matter: 100% organic, no GMOs or sludge
Release Rate: feeds plants gradually over months
Application Method: granules, ensure even spreading

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#4

8.8 score

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Miracle-Gro

Miracle-Gro Performance Organics All Purpose Plant Nutrition Granules - 2.5 lb., All-Purpose Plant Food for Vegetables, Flowers and Herbs, Feeds up to 240 sq. ft.

Release Rate: starts working in about a week
Application Method: sprinkle on dry soil, mix, water

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8% OFF
#5

8.5 score

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Miracle-Gro

Miracle-Gro Performance Organics Edibles Plant Nutrition - Organic Plant Food Feeds Instantly, for Tomatoes, Vegetables, Herbs and Fruits, Promotes a Bountiful Harvest, 1 lb.

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20% OFF

Related Products

#6

8.2 score

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Espoma

Espoma Organic Plant-Tone 5-3-3 Natural & Organic All Purpose Plant Food; 4 lb. Bag; The Original Organic Fertilizer for All Flowers, Vegetables, Trees, and Shrubs. - Pack of 2

Nutrient Content (N-P-K Ratio): 5-3-3
Source of Organic Matter: natural and organic ingredients
Release Rate: slow-release
Application Method: apply to soil and water thoroughly

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10% OFF
#7

7.9 score

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Espoma

Espoma Organic 8 Ounce Concentrated Indoor! Plant Food - Indoor Plant Fertilizer for Large & Small Plants Like Pothos, Fiddle Leaf Fig, Monstera, Snake & Palms

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67% OFF
#8

7.6 score

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Espoma

Espoma Organic Bloom! 16-Ounce Concentrated Plant Food – Plant Fertilizer and Bloom Booster for All Flowering Plants. Promotes Vigorous Growth and Blooming

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#9

7.3 score

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Down To Earth All Natural Fertilizers

Down To Earth All Natural Fertilizers Organic All Purpose Tomato & Vegetable Mix 4-6-2, 5 lb

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#10

7.0 score

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Dr. Earth

Dr. Earth Flower Girl Bud & Bloom 3-9-4 Organic Fertilizer Formula, 4-Pound Bag

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Buying Guide for the Best Organic Fertilizers

Choosing the right organic fertilizer for your garden or farm is crucial for ensuring healthy plant growth and soil fertility. Organic fertilizers are derived from natural sources and provide essential nutrients to plants while improving soil structure and promoting beneficial microbial activity. When selecting an organic fertilizer, it's important to consider the specific needs of your plants, the condition of your soil, and the type of crops you are growing. Here are some key specifications to help you make an informed decision.
Nutrient Content (N-P-K Ratio)The N-P-K ratio represents the percentage of nitrogen (N), phosphorus (P), and potassium (K) in the fertilizer. Nitrogen promotes leafy growth, phosphorus supports root development and flowering, and potassium enhances overall plant health and disease resistance. For leafy vegetables, a higher nitrogen content is beneficial, while flowering plants and root crops may require more phosphorus and potassium. Understanding the specific nutrient needs of your plants will help you choose the right N-P-K ratio.
Source of Organic MatterOrganic fertilizers can be derived from various sources such as compost, manure, bone meal, blood meal, and seaweed. Each source has its own nutrient profile and benefits. For example, compost is excellent for improving soil structure and microbial activity, while bone meal is rich in phosphorus. Consider the specific benefits of each source and how they align with your gardening goals. If you aim to improve soil health, compost or manure might be ideal, whereas bone meal or blood meal could be better for boosting specific nutrients.
Release RateThe release rate of nutrients from organic fertilizers can vary. Some fertilizers provide a slow, steady release of nutrients over time, while others offer a quicker nutrient boost. Slow-release fertilizers, such as compost and manure, are ideal for long-term soil health and sustained plant growth. Quick-release options, like fish emulsion or liquid seaweed, are useful for addressing immediate nutrient deficiencies. Consider whether your plants need a quick nutrient boost or a steady supply over the growing season.
Soil pH CompatibilityDifferent organic fertilizers can affect the pH level of your soil. Some fertilizers, like lime, can raise soil pH, making it more alkaline, while others, like sulfur, can lower it, making the soil more acidic. It's important to test your soil's pH before choosing a fertilizer to ensure compatibility. Most plants prefer a slightly acidic to neutral pH (6.0-7.0). If your soil pH is outside this range, select a fertilizer that will help bring it closer to the optimal level for your plants.
Application MethodOrganic fertilizers come in various forms, including granular, liquid, and powder. Granular fertilizers are easy to apply and provide a slow release of nutrients. Liquid fertilizers are quickly absorbed by plants and are ideal for foliar feeding or addressing nutrient deficiencies. Powdered fertilizers can be mixed with water or applied directly to the soil. Consider the ease of application and the specific needs of your plants when choosing the form of fertilizer. For example, liquid fertilizers are great for container plants, while granular options are suitable for larger garden beds.

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