A blueberry trial in central Washington, using four 13 oz/acre applications of Vitazyme, proved that the product greatly improved both the yield and quality of the berries. Fruit diameter was increased by 11%, fruit weight by 33%, and fruit Brix by 1.20 percentage points, indicating the berries were much larger and sweeter than the untreated control berries. A picked yield increase of 39% closely paralleled the 33% heavier fruit. This trial illustrates the pronounced improvement in the yield, quality, and income from blue- berries grown with Vitazyme in Washington.