Formulation: Calcium Sulfate derived from Gypsum Quick-acting formula that is pelletized for clean and easy application. Use to help loosen heavy clay and compacted soils which in turn, promotes root development. Improves soil structure; reduces surface crusting; improves water penetration and seed emergence; provides essential calcium and sulfur and helps remove sodium from the soil. Application: Apply 1 cup at the base of shrubs; 1 lb. per 100 sq. ft. for vegetables and flower gardens; use 1 to 2 lbs. per Tree.