Calculating Growing Degree Days

By Staff
Published on September 14, 2012
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Calculating Growing Degree Days

Learn how to calculate growing degree days for a more accurate prediction of when things bloom and more successful honey production.

September 17, 2012

By Kim Flottum

There’s a simple technique for starting your own growing degree days (GDD) database, but first a ground rule. Plants essentially don’t grow if the ambient high temperature for the day is more than 86°F (30°C), or the low temperature for the day is below 50°F (10°C), so these two extremes must be noted in all calculations.

The basics of calculating growing degree days is as such:

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