I just placed our second order with
Northeastern Vine Supply. If you are looking for wine grapes that tolerate cold weather, I can't say
enough good things about the quality of the vines we got from them last year. Of
course, nothing fruited yet, and it's all speculation as to what might work here in our alkaline soil and short season, but something will. The zones for true vinifera wine grapes are impossible for many of us. They have some pretty neat options to try, delivered on time, healthy plants.
I got some friends together and we ordered over 60 vines, which got the price down very quickly. I've read that you can expect 5-6 750ml bottles of wine per vine, if that helps scale your needs. Some of the fruit is dual-purpose, table and wine. I read somewhere recently that Frontenac is a decent table grape. Don't know about raisins from any of these varieties.
I will say this: if you don't auger your planting holes like we do, be prepared to dig a very deep hole for each vine. The
root systems were incredible, some were 3' long.
