Growing Organic Grow-Cal Amino Acid Chelated Liquid CalciumWe've been searching long and hard for a calcium25 replacement. The wait is finally over! Grow Cal is derived from non synthetic calcium chloride and is amino acid chelated with no EDTA chelators used at all, meaning this is safe for microbes. We believe multiple sources of calcium create the best results when considering immediate and long term needs. Grow Cal can be used not only as a foliar but also as a drench and we've seen great results doing