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 to strengthen cell walls and aid in fruit development, helping you avoid the costly and frustrating deficiencies that cause these problems. Get ahead of the game with Gringo Rasta! Gringo Rasta Cal-Mag contains 3% Calcium (Ca) and 9% Magnesium (Mg).