Talk:Growing degree day

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"I'd like to find GDD references for Poinsettias, Roses and Lilies because they are so commonly forced for Holidays" [old request comment removed from text - MPF (talk) 09:52, 20 November 2007 (UTC) ]

[edit] Incorrect calculation

There are three methods I've read about to calculate growing degree days. None of them use the method listed here.

I think the calculation should be to find the average of max and min and subtract the base temperature. If that number is negative, then GDD = 0. Otherwise that number is GDD. The method listed here (if Tmin or Tmax is below Tbase, set them to Tbase) would over estimate GDD. —Preceding unsigned comment added by 128.174.75.226 (talk) 23:29, 10 December 2007 (UTC)