30 LB, Organic Lightning Lime, Covers 5,000 SQFT, Works In Just 68 Weeks, It Utilizes Pure Calcium Carbonate That Has Been Ground To An UltraFine Powder Before It Is Pelletized, Enhanced With A Proprietary Combination Of Organic Humic Fulvic Acids That Helps Convert Calcium Into An Immediately Available Form, Approved For Organic Gardening