cultivarFig. 1. The effect of mean daily temperature (◦C) on the flowering rate in nine species of ornamental crops modeled, using Eq. (1) (panels B–I) and Eq. (3) (panel A) andparameter estimates from Table 2 for the spring replication () and fall replication (). When regression slopes were nonsignificant between the two replications (P ≤ 0.05),data were pooled () for statistical analysis. Flowering rate was calculated by taking the reciprocal of the number of days to flower. Each symbol represents the treatmentmeans, and error bars represent 95% confidence intervals. Tmin(base temperature) is the estimated minimum temperature at or below which the rate of progress towardflowering is zero. r2and R2are the coefficient of determination generated for linear and nonlinear crop models, respectively.