Derived from limestone, organic DTE Garden Lime is a quick and efficient way to raise soil pH (sweeten the soil) for optimal plant performance. This product is made from natural limestone that is ground into an ultrafine powder and then formed into uniform tiny granules. This process, known as prilling, creates granules that make the lime fast-acting and easy to spread. DTE Garden Lime also provides calcium, an essential plant nutrient which provides structural support for plant cell walls and activates metabolic enzymes. Improves plant growth and heightens fertilizer performance Works to help boost Calcium (Ca) OMRI listed and CDFA registered Can be used on lawns, vegetable gardens, flower beds, trees and shrubs If you would like a lime that supplies both Calcium (Ca) and Magnesium (Mg), try DTE Dolomite Lime . Shop All Down to Earth products here .