GRINGO CAL MAG 1 GAL, Have you ever met a grower that was Super stoked about Blossom end rot or tip burn? No way! That's why Foxfarm brings you gringo Rasta Cal-Mag. Calcium & magnesium help strengthen cell walls & aid in fruit development, helping you avoid the costly & frustrating deficiencies that cause these problems. Get ahead of the game with gringo Rasta!