摘要： Red ?respike (Odontonema strictum) is a tropical ?owering plant that was selected as a potential ?owering potted plant for its attractive red ?oral spikes. The objective of this study was to evaluate how light intensity, photoperiod, and temperature affect the growth and ?owering of ?respike. In Experiment 1, plants were grown under 0%, 45%, or 65% shade and two photoperiod conditions; long-day (LD = ≥14 h) and short-day (SD = 9 h), for 16 weeks. Plants grown under 45% shade + LD were tallest at 35.9 cm, while plants grown under 65% shade + SD were shortest at 22.8 cm. During the ?nishing stage, the number of in?orescences increased when plants were grown under 45% shade + SD, 45% shade + LD, and no shade, with 6, 7, and 9 in?orescences, respectively. In addition, the ?rst open ?ower was observed in the 0% shade group (control) 92 days after starting the experiment. The time to ?rst open ?ower increased when the plants were grown under 65% shade, either under SD or LD. In Experiment 2, plants were grown in controlled environment growth chambers with average daily temperatures of 15, 25, or 35 ?C and an irradiance of 200 μmol·m?2·s?1 for 9 h per day. Plants grown at 25 ?C were the tallest and had the largest leaf area. Plants grown at 15 and 35 ?C had 28% and 22% less leaf area, respectively. The average number of in?orescences in plants grown at 25 ?C was 1.6, while no in?orescence development was observed in plants grown at 15 or 35 ?C by the termination of the experiment. There were no differences between plant growth index or branch number in response to temperature. Under the experimental conditions tested, the most rapid and uniform ?owering of ?respike occurred when plants were grown under no shade or at 25 ?C.