10 Best Organic Fertilizers 2025 in the United States

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.

A notable strength is its easy application method; it can be used with a watering can or the Miracle-Gro Garden Feeder, making it convenient for both indoor and outdoor use. The mixing instructions are straightforward: 1/2 tsp per gallon of water for indoor plants and 1-1/2 tbsp per 1-1/2 gallon of water for outdoor plants. However, a potential drawback is that it might not be fully organic, which could be a concern for those strictly adhering to organic gardening.

Additionally, its water-soluble granules and powder form ensure quick nutrient release, which is beneficial for immediate plant needs but might require more frequent applications. It is important to consider its compatibility with your specific soil pH and the balance of nutrients it provides based on the specific needs of your garden.

Down To Earth All Natural Fertilizers Fruit Tree 6-2-4 is designed specifically for fruit trees like apples, pears, plums, and tropical varieties. Its nutrient ratio (6-2-4) provides a good balance of nitrogen, phosphorus, and potassium, which supports healthy leaf and branch growth, flowering, and fruit production. Being organic and OMRI listed means it’s free from synthetic chemicals, making it safe for organic gardening and environmentally friendly.

The fertilizer comes in granule form and releases nutrients slowly over the growing season, which helps feed plants steadily without overwhelming them. It also adds organic matter to the soil, improving soil fertility and encouraging beneficial microbes, which is important for long-term soil health. This product works well with a variety of fruit plants, including berries and grapes, not just trees. One thing to keep in mind is that it’s best suited for soils that aren’t extremely acidic or alkaline, as it doesn't specify wide pH adaptability.

Application is straightforward since it is granular, but users should follow recommended amounts to avoid overfeeding. The package size (about 7 pounds) is convenient for small to medium garden setups but might not be enough for larger orchards. This fertilizer is a solid choice for gardeners looking to nurture fruit trees organically with steady nutrient release and soil improvement benefits.

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.

The slow-release formula is designed to provide long-lasting support for your plants, gradually delivering nutrients over time and reducing the risk of nutrient leaching. This can help maintain soil health and fertility in the long term. The product comes in a granular form, which is easy to apply directly to the soil or mix into garden beds. However, some users might find the 5 lb packaging a bit small for larger gardens, necessitating more frequent purchases.

This fertilizer is suitable for a variety of vegetables, making it a convenient option for diverse garden setups. This product is best for small to medium-sized vegetable gardens and for gardeners who prioritize an eco-friendly, balanced fertilizer with a gradual nutrient release.