This Microsoft Excel spreadsheet allows users to predict the effect of modifying greenhouse temperature on crop production time. First, select one of the 70+ floriculture crops (many of which are bedding plants) in the drop-down list, then specify your typical finish crop time at a particular temperature. The model then predicts the effect of increasing or decreasing temperature at 2 °F intervals, assuming all other conditions are the same. Developed by Paul Fisher (Univ. of Florida), Erik Runkle and Matt Blanchard (Michigan St. Univ.) and John Erwin (Univ. of Minnesota).