This was the third year that Vitazyme was applied to the same grape plants in this vineyard near San Miguel, California. The Cabernet Sauvignon grapes responded very well to the product, increasing in yield by 30%, the vines also significantly increasing in length and girth. The yield increase was solely due to larger grapes in the treated area, since the bunches of both treatments were thinned the same early in the season. In spite of the higher yield, the juice brix and quality were equivalent for the two batches. These two lots of wine from the Vitazyme and control treatments will be evaluated periodical- ly throughout the coming year for quality and taste differences.