Abstract
To harvest Lilium × formolongi cv. Hayachine flowers in April and May, effects of night break and heating treatment were examined. The flowering time of ‘Hayatine’lily was accelerated to the middle of April by night-break and heating treatment, but to late May by night-break treatment alone. When liles were planted in September and October, flowering time was earlier and the resulting quality of cut flowers was better, compared to those planted at other times. There was little difference in the quality of cut flowers regardless of the starting time of the night break treatment.
