This apple nursery trial in central Washington, wherein Vitazyme was applied as a root dip and three times later through drip irrigation, revealed that tree height was increased by 5%, and trunk circumfer- ence by 10%. The excellent improvements in tree growth obtained in this trial show the ability of the pro- gram to aid nursery growers in accelerating tree caliber to improve sales income. The program will contin- ue through the fall of 2015 when the stock will be harvested and sold.