Fruit and Vegetative Responses of the Highbush Blueberry to Gibberellic Acid under Greenhouse Conditions1

Abstract

Abstract Gibberellic acid (GA) at 0, 5, 50, 200 and 500 ppm was applied to the highbush blueberry, var. ‘Coville,’ for 3 consecutive fruiting periods in the greenhouse. Application to the flower was a prerequisite for parthenocarpic fruit set and development. No significant differences were found in the number of shoots formed, shoot length, and stem or trunk diameter. GA caused a significant reduction in the number of flower buds formed for the next crop.