10 Best Compost Fertilizers 2026 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.

Fox Farm Big Bloom Liquid Plant Food is a liquid organic fertilizer designed especially for flowering and fruiting plants. It contains natural ingredients like earthworm castings and bat guano, which are rich in organic matter and provide essential nutrients. The nutrient ratio (0-0.5-0.7 NPK) shows it offers very low nitrogen but moderate phosphorus and potassium, making it ideal to promote blooms and fruits rather than leafy growth.

Being a liquid, it allows plants to absorb nutrients quickly, which is useful if you want faster results. The product supports all stages of plant growth but shines best during flowering and fruiting phases. The texture is liquid, so it mixes easily with water for simple feeding, but it may need more frequent application compared to solid composts.

Since it’s made from natural sources, it fits well for gardeners looking for organic options, but those needing a more balanced fertilizer with higher nitrogen might need to supplement it. It is a great choice if you want an organic bloom booster that feeds plants efficiently and encourages vibrant flowers and fruits.

Miracle-Gro Shake 'N Feed Citrus, Avocado, Mango Plant Food is a granular fertilizer designed to support the growth of these specific fruit trees in both containers and garden soil. With an NPK ratio of 8-2-10, it offers a higher focus on potassium and nitrogen, which are essential for fruit production and healthy plant growth. The addition of magnesium, sulfur, and iron helps address common nutrient deficiencies, making it a well-rounded option for boosting tree health. This product feeds plants for up to three months and is formulated to prevent overfeeding or burning when used as directed, making it user-friendly for both beginner and experienced gardeners. The granule texture ensures easy application and steady nutrient release.

As a synthetic fertilizer, it lacks organic matter that composts typically provide, which means it won't improve soil structure or microbial life as organic compost-fertilizers do. It is a fast-acting fertilizer rather than a mature compost, so it doesn't contribute to long-term soil health benefits. This fertilizer is best suited for those wanting quick nutrient supply and targeted feeding for citrus, avocado, and mango trees rather than those looking for an organic soil enhancer.