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


For all citrus, apply in sprays of sufficient water volumes to ensure thorough fruit wetting. Application to trees under stress or to trees of low vigor may cause severe leaf and/or fruit drop. A slight increase in mature leaf drop may be observed after application. Do not apply in white wash sprays in which lime or other caustic material has produced a high pH in the spray tank. If copper fungicides, insecticides, and/or oils or surfactants are applied within three weeks, either before or after, application of GibGro, significant leaf and fruit drop may occur.



(All states except California) To delay disorders associated with rind aging, e.g., puffiness, softening and orange coloration, to prevent preharvest drop of mature fruit, increase peel strength and reduce water loss during storage, and to produce a more orderly harvesting pattern:

EARLY SPRAY (before color change): The delay in rind aging is greatest when the early spray is applied before a color change. This spray timing produces the firmest rind possible. Apply a single dilute spray approximately two weeks prior to color break, which normally occurs August through September.

Do not exceed 20 ppm a.i. in the spray solution.

NOTE: Do not apply to groves that may be harvested early as a reduction in grade may result due to the delayed coloring. To avoid reduction of yields which generally follow late held crops, spot pick heavy crops to aid early marketing. Application made after December, or when trees begin to break dormancy, may adversely affect new crop. Fruit will begin to regreen if applications are made to fully colored fruit and fruit are allowed to remain on the tree for extended periods. Do not use concentrate sprays. Results may vary from season to season depending on environmental conditions.

Restricted Entry Interval

4 hours