Application of borax to the soil at the rate of 10 1b. to the acre resulted in positive correction of abnormal growth and fruiting of a number of grape vars. in a vineyard on Norfolk sandy soil. Foliar symptoms of B deficiency developed early in the growing season, with late season growth seldom exhibiting deficiency. Vines showing B-deficiency symptoms formed blossom clusters but set very few fruits. Certain vars. exhibited millerandage, i.e., they set parthenocarpic or seedless fruits on B-deficient vines. Borax greatly increased the set of fruit of self-sterile or reflex-stamen vars. Analyses showing seasonal and varietal variation in B content of leaves are given.