SLOW stem elongation and the excessive time required for production of a salable plant have been problems with a number of nursery plants including the carob tree (Ceratonia siliqua). Aqueous spray applications of potassium gibberel-late concentrations made at specific intervals, over a 20-week-treatment period, offer the possibility of producing salable plants more rapidly than would be possible under ordinary nursery management practices.

Graph to left illustrates shoot elongation over 30 week period with four gibberellin treatments compared to control. Table below details significance of treatments.