Pro-Guard is created toÊimprove a plants ability toÊtolerate heat and drought andÊto provide additional potassiumÊand a high level of silica. PotassiumÊalso helps the plant withstandÊdrought by regulating theÊopening and closing of stomata's and accelerates nutrientÊabsorption into plant roots and prevents oxygen deficiency. Pro-Guard isÊeasily the mostÊeconomical to use when compared toÊsimilar type products.