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Coldwater, Michigan | I know the map is for the area of best adaptation, but if I didn't know some history, and was to try to sell seed by that map I would miss pretty badly. For instance by that map group 4 soybeans should only be planted in the most southern areas of Ohio. When I was selling in the area for Callahan Seeds we sold group 4's as far north as Columbus, Ohio and did fairly well. They were not as popular as our mid 3's however.
If I was to go by the map: group 2's would be a full as we should go in southern Michigan. However, early to mid group 3 works really well as far north as Lansing, Michigan. Experience counts!
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Soybean maturity map for North America
