EB Stone Natural Cottonseed Meal 15lb. A source of long lasting, natural organic nutrients. Derived from the ground up seed of the cotton plant Nutrients in Cottonseed Meal are released slowly and it is non-burning and safe to use on both new transplants and existing plants. Cottonseed Meal is naturally acidifying in the soil and is recommended for use when acidifying soils and feeding plants like rhododendrons, azaleas, camellias, hydrangeas, blueberries and other plants that prefer acidic soil conditions. In the vegetable garden it is also useful for slow growing root crops.