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We have high-grade gypsum from Nevada in stock in 4 locations for immediate delivery!


We all so specialize in custom gypsum blends to met your soil specific nutrient requirements. We can blend gypsum with compost, sulfur, lime, dolomite, and or the fertilizer of your choice.


Call us for a quote! (559) 584-7695




Compost is important for developing and maintaining healthy soil. Compost supplies essential elements such as nitrogen, phosphorus, potassium, and calcium. The organic matter provided by compost aids in breaking up clay soils, in water and nutrient retention, as well as promoting the growth of beneficial microflora that enhance plant growth.



 compost pic for web sight





To meet both gypsum and potash needs, Superior soil introduces SOP-A-CAL, a custom blend of high grade gypsum and Potassium.


Gypsum Calcium Sulfate Di-hydrate Equivalent of 86.6%

Total Soluble K20 7.01%





Superior Soil Supplements © 2006