Elston Gunn wrote:

Thanks, everyone. I am in northwest Indiana.

I am looking for a red variety, that's why I was
thinking frontenac.

*** Any other red varieties I should be looking
at? ***

By the way, in answer to my original question as
to gallons per vine, Jeff Cox in From Vines to
Wines says a mature vine yields 8 to 12 pounds
of grapes and that 11 or 12 pounds of grapes
yield a gallon of
finished wine. p. 28

I think Cox's averages are pretty good.
It gets pretty cold in northwest Indiana (I grew
up in Northern Illinois) so Frontenac (from what
I have read) should be a good variety for you. I
think someone posted a while back that there is a
new variety similar to Frontenac that is even
better. My suggestion is to find a winery that
makes wine from that grape (maybe in Michigan)
and taste the wine first before you grow it
yourself.