FoxFarm Cal-Mag (1 gal)Gringo Rasta Cal Mag from FoxFarm is designed to support strong plant structure and healthy yields by supplying two essential secondary nutrientscalcium and magnesium. These minerals play a vital role in strengthening cell walls, aiding in enzyme activity, and supporting fruit and flower development for a more productive garden. Ideal for use in both soil based and hydroponic systems, Cal Mag helps prevent common nutrient deficiencies that can lead to