Dyna-Gro Mag ProThis Unique Plant Supplement Can Be Used With Any Complete Nutrition Formula As A Blossom Booster To Help Initiate Flowering & Develop Large, Vibrant, Fragrant Flowers, Fruit, & Vegetables Mag Pro 2 15 4 is a supplement high in phosphorus, magnesium, and sulfur. The nutrients in Mag Pro are immediately available, giving your plant the ability to access the nutrients they need at the critical times of flower formation to ensure massive growth, enhanced