Thanks for the information about grape leaves. Looking at the slideshow in this thread, I think I can rule out itasca since the leaves are pretty different.
The University of Minnesota is releasing its fifth cold-hardy wine grape and it’s named ‘Itasca.’
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Itasca wine grape.The new grape, which will be used to make dry white wines, is the latest in a series of cold-hardy cultivars released by the university that led to the nascent wine industry in Minnesota and other northern climates around the world. Itasca has lower acidity and high sugar levels, says U of M grape breeder Matt Clark, coupled with high resistance to common grape pests suc…