Abstract
The effect of night break on flowering time of Lilium × formolongi was examined. The flowering time of ‘Sakigake-raizan’, ‘White Lancer’ and ‘Inakei’ was accelerated to June by night break treatment for 4 hours for cultivars planted in February., When night break was started during the period from February to April, the flowering time of ‘White Lancer’ was late June. More than four weeks of night break are required to harvest flowers in June.
