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| Climate and vineyard site selection |
| Home > weather > climate > growing season heat accumulation |
| For maps with data about: Growing season length Growing season heat accumulation Winter injury Here are some of the non-climatic factors you'll want to consider in selecting a site: |
| Growing season heat accumulation |
| In-season crop development is governed by the magnitude and rate of heat accumulation, described by Growing Degree Days (GDD). In this figure, the numbers given are the mean number of base 50ºF GDDs accumulated between the last freezing temperatures of the spring and the first freezing temperatures of the fall. Grape varieties have different GDD requirements for full ripening. Sites may have greater or fewer GDD than this map suggests based on micro- and mesoclimatic variables. (See Extension Bulletin, Vineyard Establishment I E-2644 - view text, ordering information) |
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| (Note: the totals in this figure are calculated using Baskerville-Emin, base 50 GDD). Data and maps prepared by Aaron Pollyea, Peter Kurtz, and Tracy Aichele, Michigan Climatological Resources Program, Michigan State University Department of Geography, based on data from the National Oceanic and Atmospheric Administration Summary of the Day series (NOAA, 1952-2001). |
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05/24/11 Contact: E. Haney