Wang and Hsu (1994) observed that applications of paclobutrazol at doses of 50, 100, 200 and 400 mg L-1 to Phalaenopsis orchids did not produce any statistical differences in the number of lateral inflorescences when treated plants were compared with controls. The results differ from those obtained by Wilkinson and Richards (1991) working with azaleas. They applied paclobutrazol at doses of 0.1, 0.2, 0.3 and 0.4 g per pot and found that the number of buds increased as the doses increased, reaching a total of 80 buds at the highest dose, compared with 4 buds on the control plants.