Espoma Organic Garden Gypsum (6 lb) loosens heavy clay soil and improves drainage WITHOUT changing soil pH — important because lime also loosens clay but raises pH, which isn't always what you want. Gypsum is calcium sulfate: the calcium breaks apart compacted clay particles, and the sulfur provides a secondary nutrient. If your garden has heavy clay that holds water and compacts into bricks, gypsum is the amendment that loosens it without affecting the acidity. Available in Galion, OH.
