Abstract: Effects of plant-growth regulators on potted mei flower cultivation were studied. The results showed that ABT treatment stimulated rooting of Prunus mume var. Qingmei cuttings. The highest rooting rate (82.2% ) was achieved by 100 mg/L treatment, 37.1% higher than the control. Paclobutrazol treatment at 1 000 mg/L concentration was most effective in inhibiting shoot growth and promoting flower formation. The flowering period was markedly delayed by spraying GA₃ from early Sep tember to middle October, and the extent of effection was positively correlated with the concentration of GA₃. Application of GA₃ at 1 000 mg/L had the best result. The flowering period was advanced by spraying GA₃ from late October to November.

Key words: Mei flower, Plant-growth regulator, Potted flower