Pure Blend® Pro Grow 3-2-4 contains only natural sources of essential major, secondary, and trace minerals from the land and sea that promote vigorous, lush green vegetation in a 100% soluble form. Providing increased nutritional value for developing fruiting, flowering and vegetable plants, Pure Blend Pro Grow is an environmentally friendly alternative to conventional chemical fertilizers. Plants are not exposed to toxic heavy metals often found in chemical fertilizers.It is formulated for all hydroponics and soil applications and can be used with all growing media.