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Effects of temperature and light on the axillary bud initiation of branchless chrysanthemum were investigated. Number of axillary bud set was significantly increased up to 9.3 per shoot by daytime high temperature treatment of around 45℃ in summer, compared to control (0.1 ea per shoot). When rooted cuttings were treated with low temperature (7℃, 2,000 lux, day length 16 hours, for 4 weeks) after high temperature treatment (around 45℃, 5 hours daytime, for 3-4 weeks), the number of the axillary buds set was increased 5-6 times as many as that of control plant grown at night temperature over 15℃. In summer, Seolpoong, branching cultivar, had a lot of blind nodes up to 7.8 per shoot in house and 10.5 in field. Number of axillary bud set was not affected by different shading levels, and light qualities through color films.
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