DTE Garden Gypsum is a multi-tasking powerhouse of a soil amendment. It will improve the physical condition of soil and enhance drainage in compacted and heavy clay soil. It will also help remediate and revise alkaline, saline and sodic soils. It does all this in addition to providing supplemental calcium (Ca) and sulfur (S). This gypsum has been ground into an ultrafine powder and then formed into uniform tiny granules. This process, known as prilling, creates granules that make the product fast-acting and easy to spread. Neutral pH and will not affect acidity OMRI listed and CDFA registered Can be used on lawns, vegetable gardens, flower beds, trees and shrubs Performing a soil analysis before use is recommended, but not essential. A test will give you the best information on what your soil needs, but if you don’t do one you can apply DTE Garden Gypsum at the recommended rates in the instructions. Shop All Down to Earth products here .