Hygrozyme Horticultural Enzymatic Formula 20 Liter Hygrozyme® is North America’s #1 concentrated enzyme formula and is an essential addition to any grow system. With over 20 years of medical and horticultural enzyme formulation and production experience, SIPCO perfected a proprietary formula to help plants reach their full genetic potential. Hygrozyme® provides a cleaner root zone by accelerating the breakdown of dead root matter. ... — LTL Shipping Required. — Ships from H: WA, CA, CO, MI, TN, PA, FL USA (No USPS)....more info.