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.

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.

Miracle-Gro Performance Organics All Purpose Plant Nutrition Granules offer a convenient way to feed vegetables, flowers, and herbs with organic ingredients. The granules come in a shaker jug, making application simple—just sprinkle onto dry soil, mix lightly, and water. It starts working in about a week, which is fairly quick for organic fertilizers. The product covers up to 240 square feet and suggests reapplying every 4 to 6 weeks to keep plants well-nourished.

Designed as an all-purpose feed, it provides balanced nutrients suitable for a variety of plants. Because it uses natural ingredients, it’s gentle on soil and supports healthy growth without harsh chemicals. Since it’s a granular form, regular watering is needed to activate the nutrients effectively.

This product is ideal for casual gardeners or those growing a mix of common garden plants who want an easy-to-use, organic option that delivers visible results relatively quickly.