JONATHAN GREEN MAG-I-CAL Plus Lawn Fertilizer For Acidic Soil. Pack of 2 of JONATHAN GREEN MAG-I-CAL Plus Lawn Fertilizer For Acidic Soil. Natural soil food for lawns in acidic and hard soil. Rapidly rises soil pH. Helps loosen heavy, hard-packed soils and promotes air and water penetration for better rooting. Feeds and activates soil microbes and maximizes plant absorption of lawn food nutrients. Effective for 8 to 12 weeks based on environmental conditions. Ideal to use with any lawn food or annual lawn program. 28% calcium, 1.5% sulfur, 0.5% iron, 1% humic acid, 1% polyhydroxycarboxylic acids, 2% biochar. No. 11354: Bag Size: 18 Lb., Concentrate or Ready To Use: Ready To Use, Product Form: Granules, Longevity: 8 to 12 Weeks, Coverage Area (Sq. Ft.): 5000, Season Use: Spring/Summer/Fall, Pkg Qty: 1, Package Type: Bag No. 11355: Bag Size: 54 Lb., N-P-K Ratio: 28% Calcium, Concentrate or Ready To Use: Ready To Use, Product Form: Granules, Longevity: 8 to 12 Weeks, Coverage Area (Sq. Ft.): 15000, Season Use: Spring/Summer/Fall, Pkg Qty: 1, Package Type: Bag WARNING: This product can expose you to chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov. This listing is for a pack of 2. WARNING: California Prop 65 - www.P65Warnings.ca.gov.