Jonathan Green (#11353) MAG-I-CAL for Lawns in Acidic + Hard Soils, 18# (2 Pack)
Poor soil is often the problem in growing a great lawn and calcium is vital to many grass plant functions. Lawns thrive in soil with pH levels between 6.2 and 7.0. Mag-I-Cal Plus also contains humates to stimulate soil microbial life.