Jonathan Green (11356) Mag-I-Cal Plus Soil Food for Lawns in Alkaline Hard MAG-I-CAL PLUS for Lawns in Alkaline + Hard Soil is a unique, multi-faceted, soil-enhancing food that lowers soil pH, loosens hard soil, and stimulates soil microbes. MAG-I-CAL PLUS for Lawns in Alkaline + Hard Soil contains fast-acting sulfur which lowers soil pH to enhance nutrient availability from lawn foods. It also fortified with a patented, quick-releasing gypsum to help break up clay and compacted soil for better air, water, and root penetration into the soil. Additionally, MAG-I-CAL PLUS promotes growth by increasing biological activity to aid in the release of trapped nutrients in the soil. Features Size: 5000 Sq. Ft. unique, multi-faceted, soil-enhancing food that loosens hard soil, and stimulates soil microbes Lowers soil pH Much of your lawn food is wasted when soil pH is too high Breaks up clay and compacted soils USA SHIPPING estimates delivery times and we work to get your item to you as quickly as possible and within those times, but please know it may take slightly longer than the estimate.