ProGibb® Plant Growth Regulator Overview

How ProGibb Works

  • Active ingredient in ProGibb, gibberillic acid, is a natural plant growth regulator found in most plants that promotes the growth and development of flowers, fruits, leaves and stems.

  • In seedless grapes, ProGibb applied before bloom will "stretch" the cluster. This makes more room for the berries to grow larger, and also means better air circulation in the cluster to reduce disease incidence.

  • Application at bloom thins the berries so that remaining berries grow larger.

  • Sizing sprays after berry set promote berry growth and development.

  • Prestige PGR is a good partner with ProGibb programs for maximum berry size in table grapes.