Dyna-Gro Grow 7-9-5 Plant Food 1 GalWhy use 2 or 3 parts when you can use 1? Dyna Gro has spent over 30 years developing the most concentrated and complete one part formulas on the market. Grow and Bloom are low in soluble salts, complete with all 16 essential mineral elements, and are formulated with the perfect nutrient ratios for exceptional vegetative growth and blooms. Growers who have spent years mixing complicated and expensive 3 part formulas are amazed when they find a one part