Cumulative Chilling Hours
Hours below 45°F
Hours between 32°F and 45°F
November 1 thru February 28/29
Cumulative Chilling Portions
Portions (Dynamic Model)
September 1 through August 31
Cumulative Chilling - Research
Hours below 45°F
Hours between 32°F and 45°F
Units (Utah Model)
September 1 through August 31
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Harvest Prediction Module
for Peaches, Plums, and Nectarines
February 1 through May 31
Fruit & Nut Research and Information Center
Weather-Related Models
Harvest Prediction: About Growing Degree Hours
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