Where do Ontario grapes grow in Ontario?

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Ontario Grapes Grow in somewhere up north like in sudbury or sue st. Marie
-Lout
Fri Dec 12 2008
My answer is based on personal experience. The grapes in Ontario grow in the Niagara region. The climate is warmer there than any other place in the province as it is the most southerly and benefits from the lake effect of Lake Ontario. The area has many award wining wineries.
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