About Us - Superior Soil

Superior Soil

...is a premier provider of high-quality agricultural amendments and soil health solutions throughout California’s Central Valley. Specializing in essential minerals and custom blends, the company offers a comprehensive suite of products—including Gypsum, Limestone, Dolomite, Sulfur, and Compost—designed to optimize soil structure and enhance crop yields for both conventional and organic farming. By combining technical expertise with a commitment to precision, Superior Soil provides critical services like water and soil testing to ensure growers apply the exact nutrients needed for peak performance.

Key Offerings & Specialties

Superior Soil supports a wide range of industries, from large-scale agriculture to specialized turf management. Our primary solutions include:

Soil Conditioners
High-grade Gypsum sourced from Nevada to improve water penetration and break up compacted soil. (more...)

Custom Blending
Tailored Compost and Amendment Blends that allow for a single, uniform spreading operation, saving time and ensuring micronutrient accuracy. (more...)

Nutrient Management
Limestone and Dolomite applications to balance soil pH and maintain proper calcium-to-magnesium ratios. (more...)

Sulfur As A Plant Nutrient
Sulfur is taken up by plants primarily as a sulfate. Sulfate is important in photosynthesis and plant metabolism, which produces proteins, enzymes, and amino acids. (more...)

Custom Amendment Blends
We can also combine compost/manure into custom amendment blends with soil amendments such as Gypsum, Zeolite, and other amendments. (more...)

Specialized Markets

Dedicated products and support for Landscape & Nursery professionals as well as Golf & Sports Fields.

Expert Note

Zeolite and NPK Amendments

Superior Soil's use of Zeolite and NPK amendments provides a modern approach to plant metabolism and stress tolerance, ensuring long-term sustainability for the land.