CaMg+ is a superior supplement derived from oyster shell, dolomite lime and natural plant extracts, which provides your plants with all natural sources of calcium. It is also an excellent natural source of Magnesium, another critical element for luscious vegetative plant growth. CaMg+ is biologically catalyzed and projects this calcium and magnesium efficiently into the plants. As a result, when using CaMg+ you will help your plants optimize their metabolism, enhance growth and create healthier flowers and fruits. Results from CaMg+ are quick and significant. Great for horticultural hobbyists and professionals alike. Quantity: 2.5 Gallon.