Jonathan Green 54 lb. Mag-I-Cal Plus Soil Food. This natural soil food for lawns rapidly adjusts soil pH, helping to loosen heavy, hard-packed soils. It feeds and activates soil microbes, maximizing plant absorption of lawn food nutrients. Suitable for all grasses, including Bermuda grass, it covers 15,000 sq. ft. Fortified with calcium sulfate dihydrate, humic acid, fast-acting gypsum, and humates, this soil food helps to lower soil pH, increasing grass nutrient absorption. It also breaks up clay and compacted soils, improving root penetration and promoting growth. Safe to apply when seeding or sodding, it is best applied during the growing season when the soil is not frozen. Spread the product on a dry lawn soon after mowing.