Abstract
For development of forcing culture and late raising in an edible chrysanthemum, ‘Iwakaze’, the effects of low temperature on breaking rosette and long-day photoperiod on inflorescence quality were investigated. We determined that both forcing culture and late raising were possible because the harvest started in the last ten days of February with early warming after exposure to natural temperature during the second ten days of December. Thus, harvest was considerably prolonged without delaying flowering by preventing the occurrence of ‘roshinka’ inflorescence, which increased in tubulous flowers with continuous illumination starting the last ten days of August.
