Z7 is a two-part proprietary enzymatic cleanser that is super concentrated. Z7 is not a plant food, it simply allows plant foods to work better because the nutrients that you are feeding can actually get into the roots easier. Growers report a 25% decrease in plant food costs. Z7 increases the chances that the plant will grow to its genetic potential because it is constantly cleansing the root system. Z7 is to be used in every watering or feeding; field growers apply at first planting and whenever possible. Z7 is super concentrated and super economical.