General Information

Do not apply this product through any type of irrigation system.

NOTE: Gibberellic Acid is an extremely potent plant growth regulator. For best results, read all directions for use thoroughly. Consult your local experiment station specialist, distributor, or the Nufarm agricultural specialist in your area for the spray schedule best suited to your conditions.

Discard any unused spray material at the end of each day. Prepare solution concentrations by mixing the required amount of product with water only in a clean, empty spray tank. Refer to individual crop sections and rate conversion tables provided in the labeling for the amount of GibGro to be applied.

Use only as directed. The label should be read thoroughly and understood before making applications.

Effectiveness requires that all parts of plant or crop must receive spray or desired result will not occur, so spray thoroughly. When a range of rates is indicated, use the concentration and spray volume recommended locally.

Data concerning the compatibility of GibGro with other agricultural compounds is not available, except where specified.

Refer to the label regarding tank mix information.

Limitations, Restrictions, and Exceptions


(All states except California) To maintain and extend high fruiting capacity of bearing tart cherry

trees and reduce occurrence of “blind” nodes by stimulating lateral vegetative buds to develop a more productive balance of lateral shoots and spurs: GibGro must be applied annually to ensure vegetative development and subsequent yield improvement year after year.

Timing: Apply a single foliar spray between 14 to 28 days after bloom. Research and commercial experience has determined 21 days after full bloom to be optimum. Best timing is further defined as that stage when 3 to 5 terminal leaves have fully expanded, or, at least 1 to 3 inches of terminal shoot extension has occurred.

Concentration: Use 4 to 18 grams a.i. per acre depending on tree age and vigor (See table below).

Apply as a concentrate or dilute spray in sufficient water volume to ensure thorough wetting.

NOTE: Rates of GibGro in the above chart are based on expected tree vigor at various ages in a normal orchard. Each orchard presents a different situation. Adjust GibGro rate to complement vigor of trees. If trees are vigorous, use lowest rates. Use lower rates on trees that have been heavily pruned or hedged. Do not use additional wetting or spreading agents. Use higher rate for trees low in vigor and weak in shoot and spur production. Excessive application rates on any tree will increase vegetative growth at the expense of fruit production the following year.

GibGro will not improve growth of trees under stress (nutritional, moisture, winter injury) or other factors inhibiting normal growth and development resulting from physical damage or unsound orchard practices. Best results from GibGro will be obtained when combined with good cultural practices.

Restricted Entry Interval

4 hours