Sweet & Heavy Prime (0-0-1) is the base component of the three-part "Hydro-Fusion" nutrient system. Prime contains macro- and micro-nutrients derived from all-natural kelp meal as well as potassium and manganese sulfates which are fused with specific proteins and phytoacids for easy absorption. When gardeners combine Sweet & Heavy Prime with the Bloom and Grow formulas, they get a completely adjustable system that nourishes plants to increase yields and sweeten the flavor of produce. Sweet & Heavy can be customized to soil and hydroponics applications.