Nobody likes blossom end rot or tip burn. That’s why FoxFarm brings you BUSH DOCTOR® CAL-MAG. Calcium and magnesium help strengthen cell walls and aid in fruit development, helping you avoid the costly and frustrating deficiencies that cause these problems. OMRI Listed® and CDFA Registered for Organic Gardening. 1-0-0, 3% Calcium 0.9% Magnesium