Growing Degree Days (GDD) are a measure of how warm it is enabling useful comparisons between locations and between seasons.

Any questions about GDD can be sent to Dr Trevor Atkins. 

These graphs are produced using HortPlus' MetWatch software.  If you want to monitor temperatures on your own property, check out the Quick Measure Temperature Logging System.   Please note that while we take care in preparing these graphs, HortPlus accepts no responsibility or liability for the information provided or how it is used.

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