Hi folks, I just harvested our concord grapes and want to try to make wine.
My wife has already canned many jars with half grape/half sugar water to
make sweetened juice.
My question is, can the juice she has already canned with the sugar water be
used to make wine?

According to one recipe, yeast should be added to the straight mash juice
and set for 3-4 weeks, until foam dissapates. (This would be straight juice
with no sugar. Sugar would be added later).

Does sugar content in juice affect the yeast action?

Thanks for your help!

Dave LaDouce