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.

Jobe’s Organics Granular All Purpose Fertilizer is a versatile option suitable for a wide range of plants, including vegetables, flowers, shrubs, and trees. Its balanced nutrient content with a 4-4-4 NPK ratio ensures that it provides essential nutrients uniformly, which is great for plant health and yields. This fertilizer stands out because it contains no synthetic chemicals and is OMRI listed, meaning it is certified for organic gardening by the USDA, making it an environmentally friendly option.

Another benefit is its ease of application; the granules can be applied every 2-3 weeks during the growing season, making it simple to maintain plant health without over-fertilizing. The 16 lbs bag ensures you have plenty to use across different plants and areas. However, there are a few considerations to keep in mind. The release rate of the nutrients might not be suitable for plants that require immediate feeding, as it may take time for the nutrients to fully integrate into the soil.

Additionally, while it is designed to avoid waste and mess, handling granular fertilizers can still be a bit cumbersome compared to liquid alternatives. Its compatibility with soil pH is generally good, but you might need to check if your specific soil conditions are ideal. If you're looking for a reliable, organic fertilizer that balances nutrients well and is easy to apply, Jobe’s Organics Granular All Purpose Fertilizer could be a solid choice.

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.