This greenhouse study with corn revealed that Vitazyme 1 plus a root stimulator greatly increased both plant height (+11%) and dry weight (66%) above the control. The root stimulator alone increased height by 9%, and dry weight by 46%. Vitazyme 1 and Vitazyme 2 did not differ significantly in their effects on plant height and dry weight, but they exceeded the control dry weight by from 6 to 10%.