10 Best Compost Fertilizers 2025 in the United States

Scotts Green Max Lawn Food is a versatile lawn fertilizer designed for various grass types and can be used during different seasons. Its dual-action formula includes an iron supplement, which helps achieve a deep green appearance within just three days. The product's high nutrient content, including 27% nitrogen, facilitates robust grass growth.

Additionally, the inclusion of 5% iron enhances the greening process, making it particularly effective for those looking to quickly improve the aesthetics of their lawn. The product is also designed to cover a large area of up to 10,000 sq. ft., making it suitable for extensive lawns. Another practical feature is that it does not stain concrete or other hard surfaces when applied as directed.

Scotts Green Max Lawn Food may not be the best fit for those specifically looking for compost-fertilizers rich in organic matter and beneficial microbes, as it primarily focuses on lawn aesthetics rather than soil health. The texture is granular, which might be less ideal for users looking for finer compost materials.

Brut Organic Worm Castings is a high-quality option for gardeners seeking to enhance plant growth with organic fertilizers. One of its significant strengths is the nutrient-rich content, ensuring your plants receive the necessary minerals for lush and vibrant growth. Additionally, being certified organic by OMRI and CDFA assures users of its purity and adherence to organic farming standards.

The castings are produced in-house from organic materials, raised indoors, guaranteeing a controlled and clean environment, which is beneficial in maintaining high-quality organic matter and nutrients. The family-owned brand, Brut Worm Farms, emphasizes care in production, which adds a personal touch to the product's credibility and reliability.

Brut Organic Worm Castings is a solid choice for those looking to naturally boost their garden's health, especially if they prioritize organic and family-produced products.

Wiggle Worm Castings Plus Worm Egg Material is a 40-pound organic fertilizer made from pure earthworm castings combined with worm egg material. This mix boosts soil health by improving nutrient content and encouraging beneficial microbial activity, which benefits houseplants and vegetable gardens. The product has a fine granule texture that helps with soil aeration, promoting better root growth.

Being mostly pure worm castings, it contains high organic matter, which enriches soil fertility naturally. Some small debris like tiny rocks might be present, which is common in this type of product but usually doesn’t harm plants. The presence of worm eggs means the material can introduce new worms to your soil, enhancing long-term soil structure and nutrient cycling. Worm castings generally tend to be neutral to slightly acidic, making them safe for most plants.

The packaging emphasizes cost efficiency, which helps keep the price reasonable but might not provide premium protection during shipping. Hatchlings may appear after arrival, which can be beneficial for soil health but might surprise some users. This fertilizer is a strong option for gardeners seeking a natural, nutrient-rich amendment to improve plant growth and soil life, especially for those wanting to avoid synthetic chemicals. However, if a fully sifted, debris-free product or specific pH information is desired, this might be less suitable.