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10 Best Organic Garden Fertilizers 2025 in the United States
#1
Winner
Jobe’s Organics Granular Garden Fertilizer, Easy Plant Care Fertilizer for Vegetable Gardens and Tomato Plants, 16 lbs Bag
Jobe’s Organics Granular Garden Fertilizer is designed specifically for vegetable gardens and tomato plants. It comes in a 16 lbs bag and features a 2-5-3 NPK ratio, which means it has a balanced mix of nitrogen, phosphorus, and potassium suitable for promoting plant growth, root development, and vibrant foliage. The fertilizer is OMRI listed, highlighting its compliance with organic gardening standards and absence of synthetic chemicals, making it an excellent choice for eco-conscious gardeners.
Rating
9.9
Chosen by1,107
Source of Nutrients
Release Rate
Application Method
Most important from
17987 reviews
#2
FoxFarm - Big Bloom Plant Food, Liquid Fertilizer Concentrate for Flowers, Fruits, and Vegetables, All Purpose Plant Fertilizer for Indoor & Outdoor Potted Plants, NPK 0-0.5-0.7 (Pint)
FoxFarm Big Bloom Plant Food stands out as an organic liquid fertilizer designed to enhance the growth and flavor of flowers, fruits, and vegetables. Its notable strength lies in its unique formulation that includes earthworm castings and bat guano, offering a rich array of nutrients without harmful chemicals. This makes it suitable for gardeners prioritizing a natural approach to plant care.
Rating
9.8
N-P-K Ratio
Source of Nutrients
Release Rate
Most important from
12619 reviews
#3
Miracle-Gro Shake 'N Feed All Purpose Plant Food, For In-Ground and Container Plants, Feeds for up to 3 Months, 4.5 lbs.
The Miracle-Gro Shake 'N Feed All Purpose Plant Food is a versatile product suitable for a variety of plants, both in-ground and container-based. Its strength lies in its ability to feed plants for up to 3 months, which reduces the frequency of reapplication and ensures consistent nourishment. The inclusion of vital micronutrients helps in producing stronger and more vibrant plants, which is a major plus for any gardener aiming for a healthy garden.
Rating
9.7
Soil Condition
Application Method
Most important from
16163 reviews
Top 10 Best Organic Garden Fertilizers 2025 in the United States
#1
Winner
Jobe’s Organics Granular Garden Fertilizer, Easy Plant Care Fertilizer for Vegetable Gardens and Tomato Plants, 16 lbs Bag
Jobe’s Organics Granular Garden Fertilizer, Easy Plant Care Fertilizer for Vegetable Gardens and Tomato Plants, 16 lbs Bag
N-P-K Ratio: 2-5-3
Source of Nutrients: OMRI listed, organic
Release Rate: Every 4-6 weeks
Soil Condition: Improves soil condition
Plant Type: Vegetable and tomato
Application Method: Granular
Chosen by 1107 this week
FoxFarm - Big Bloom Plant Food, Liquid Fertilizer Concentrate for Flowers, Fruits, and Vegetables, All Purpose Plant Fertilizer for Indoor & Outdoor Potted Plants, NPK 0-0.5-0.7 (Pint)
FoxFarm - Big Bloom Plant Food, Liquid Fertilizer Concentrate for Flowers, Fruits, and Vegetables, All Purpose Plant Fertilizer for Indoor & Outdoor Potted Plants, NPK 0-0.5-0.7 (Pint)
N-P-K Ratio: 0.01-0.03-0.7
Source of Nutrients: earthworm castings, bat guano
Release Rate: slow
Plant Type: variety of plants
Application Method: mix with water
Miracle-Gro Shake 'N Feed All Purpose Plant Food, For In-Ground and Container Plants, Feeds for up to 3 Months, 4.5 lbs.
Miracle-Gro Shake 'N Feed All Purpose Plant Food, For In-Ground and Container Plants, Feeds for up to 3 Months, 4.5 lbs.
Source of Nutrients: natural ingredients
Release Rate: up to 3 months
Plant Type: flowers, vegetables, herbs
Application Method: granule form
FoxFarm Fertilizer Soil Trio Liquid Nutrient: Tiger Bloom, Grow Big, Big Bloom Bottles - (Pack of 3-1 Pint)
FoxFarm Fertilizer Soil Trio Liquid Nutrient: Tiger Bloom, Grow Big, Big Bloom Bottles - (Pack of 3-1 Pint)
Source of Nutrients: OMRI listed, CDFA certified
Soil Condition: Organic
Plant Type: Various plants
Application Method: Mix with water, apply
Miracle-Gro Shake 'n Feed Tomato, Fruit and Vegetable Plant Food, For Outdoor In-Ground and Potted Plants, Feeds up to 3 Months, 4.5 lbs.
Miracle-Gro Shake 'n Feed Tomato, Fruit and Vegetable Plant Food, For Outdoor In-Ground and Potted Plants, Feeds up to 3 Months, 4.5 lbs.
Source of Nutrients: calcium
Release Rate: slow release over 3 months
Soil Condition: typical garden soils
Plant Type: tomatoes, fruits, vegetables
Application Method: apply on soil, mix lightly
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Buying Guide for the Best Organic Garden Fertilizers
Choosing the right organic garden fertilizer is crucial for the health and productivity of your plants. Organic fertilizers are derived from natural sources and help improve soil structure, provide essential nutrients, and promote 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 garden you have. Understanding the key specifications of organic fertilizers will help you make an informed decision and ensure your garden thrives.N-P-K RatioThe 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. For leafy vegetables, a higher nitrogen content (e.g., 10-5-5) is beneficial. For flowering plants and root crops, a balanced or higher phosphorus and potassium ratio (e.g., 5-10-10) is ideal. Choose a fertilizer with an N-P-K ratio that matches the specific needs of your plants.
Source of NutrientsOrganic fertilizers can be derived from various natural sources such as compost, manure, bone meal, blood meal, and seaweed. Each source has different nutrient profiles and benefits. For example, compost is a well-rounded option that improves soil structure, while bone meal is high in phosphorus, making it great for root development. Consider the nutrient needs of your plants and the benefits of each source when selecting a fertilizer.
Release RateThe release rate of a fertilizer indicates how quickly the nutrients become available to plants. Slow-release fertilizers provide a steady supply of nutrients over time, which is ideal for long-term plant health and reducing the risk of nutrient burn. Fast-release fertilizers offer immediate nutrient availability, which can be beneficial for quick growth spurts or correcting nutrient deficiencies. Choose a release rate that aligns with your gardening goals and the specific needs of your plants.
Soil ConditionThe condition of your soil plays a significant role in determining the type of fertilizer you need. Conduct a soil test to identify any nutrient deficiencies or imbalances. For sandy soils, which drain quickly, a fertilizer with higher organic matter content can help retain moisture and nutrients. For clay soils, which retain water, a fertilizer that improves aeration and drainage is beneficial. Tailor your fertilizer choice to address the specific needs of your soil.
Plant TypeDifferent plants have varying nutrient requirements. Vegetables, flowers, shrubs, and trees all have unique needs. For example, fruiting plants like tomatoes and peppers benefit from higher phosphorus levels, while leafy greens like lettuce and spinach thrive with more nitrogen. Research the specific nutrient needs of the plants in your garden and choose a fertilizer that caters to those requirements.
Application MethodOrganic fertilizers come in various forms, including granular, liquid, and powder. Granular fertilizers are easy to apply and provide a slow, steady release of nutrients. Liquid fertilizers offer quick nutrient absorption and are ideal for foliar feeding or addressing immediate deficiencies. Powdered fertilizers can be mixed with water for a customizable application. Consider the ease of use and the specific needs of your garden when selecting an application method.