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.



To delay aging of the rind and reduce rind disorders (e.g. rind staining, water spotting, sticky or tacky surface, puffy rind and rupture under pressure) and to produce a more orderly harvesting pattern:

LATE SPRAY (after color break): Apply one spray just after marketable color has developed which is normally from October through December.Apply 16 to 48 grams a.i. per acre as a concentrate or dilute spray in sufficient water volume to ensure thorough wetting. This application may cause fruit regreening.

NOTE: Do not apply the early spray to groves that may be harvested early as a reduction in grade may result due to the delayed coloring. Do not apply from January through July. Sprays applied during this time may cause reduced production the following year. Slower color development should be expected in the target crop. Increased regreening of mature fruit, if present may occur. After marketable color is achieved, treatment effects may be reduced the longer treated fruit remain on the tree.

Restricted Entry Interval

4 hours