Iowa currently has 85 state-licensed wineries and more than 413 vineyards covering 1,200 acres in 95 of Iowa's counties. The estimated total economic impact for the state is $234.3 million.
The largest concentration is in Warren County, just south of Des Moines -- an area called the "Napa Valley of Iowa" by Mike White, Iowa State University Extension Viticulturist.
Read more from the ISU news service.
Map from ISU Viticulture Information page.
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