There was a positive correlation (P < 0.001) between the estimated Tmin and delay in flowering time when plants were grown at 17 versus 0.001.23◦C. For example, the delay in flowering time when plants weregrown at 17◦C compared with 23◦C was 105, 53, and 34% inglobe amaranth (Tmin= 13.8◦C), geranium ‘Ringo 2000 Deep Red’(Tmin= 5.7◦C), and osteospermum (Tmin= −0.5◦C), respectively