In this greenhouse study on corn, all but two treatments significantly increased plant height above the control. Product G-2 gave the greatest increase in height (10%), followed closely by Asset and Vitazyme CS. Plant dry weight showed little relationship with plant height, Vitazyme variant 2 giving the highest yield, significantly exceeding the control by 22%, and the next highest treatment — Product G-2 — by 8%. All but Product G-1 and Vitazyme variant 1 significantly exceeded the control treatment.