Peak Green Iron + Mag (4-0-6  5% Iron plus 5% Mg), formulated with Wolf Trax Technology, delivers essential micro-nutrients for healthy turf. Peak Green Iron + Mag from Solu-Cal contains groundbreaking Wolf Trax DDP Iron and Calcium from Solu-Cal to safely and easily deliver micro-nutrients to the plant as early as possible in the growth stage. Peak Green Iron ensures dark green color with no artificial surge in growth. It’s impregnated with 2% PHCA Carboxy Organic Acid to significantly increase nutrient availability. With the ability to use any time of year on turf and all types of plantings, the product covers between 5,000 and 10,000 sq. ft., with six to eight week green.