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Effects of different daylnight temperature regimes on the stem length and flowering in Lilium cernum, native in Korea, were investigated in order to appreciate the possibility of utilization as a commercial pot plant. Temperature regimes given in this study were 16/16, 16/20, 16/24, 20/16, 20/20, 20/24, 24/16, 24/20 and 24/24 (C/C). It was found that the growth and flowering was promoted with increasing average daily temperature (ADT), resulting in an increased stem elongation rate and earlier flowering as ADT increases. There were distinct differences in stem length among treatments as observed during linear phase (6th week after experiment), which was strongly affected by ADT irrespective of DIF. At anthesis, stem lengths were, however, similar in all treatments, showing no effect of ADT, or DIF. Correlationship between stem diameter and ADT or DIF was also not found. The rate of flowering was 100% in all the treatments but days to flowering was linearly shortened as day temperature increased. Additionally, the number of flower per plant increased with increasing -DIF while flower longevity increased with decreasing ADT.
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