Abstract
Effects of winter night temperature on the flowering response of snapdragons (Antirrhinum majus L.) in pinching and non-pinching cultivation were investigated. In pinching cultivation, as the night temperature was increased, the flowering of the stem was accelarated, generated under the first node of Hatsuharu and Light Pink Butterfly II, and the second node of Verne, respectively. Yields of cut flowers in Hatsuharu and Verne were the largeset at a night temperature of 16°C, but Light Pink Butterfly II was not affected by different night temperatures. In non-pinching cultivation of Light Pink Butterfly II, as the night temperature was increased, flowering was accelerated. Suitable night temperatures in winter for snapdragon cut flower production were suggested to be 6 to 11°C, 11°C and 16°C for Hatsuharu, Light Pink Butterfly II and Verne, respectively.
