Pure Blend Pro Grow (3-2-4) PURE BLEND Pro is a hydro-organic vegetative and fruit and flower formula which is a specialty custom blend of organic and natural sources of the essential major, secondary, and trace minerals in 100% soluble form from the land and sea. PURE BLEND Pro produces vigorous lush green vegetation and superior fruits, flowers, and vegetables. When compared to conventional chemical fertilizers, PURE BLEND Pro will provide increased nutritional values and is a healthy, environmentally friendly alternative.