I have had grape vines here for about 8 years now. I really don't do anthing with them but tie em up to a fence and trim em every now and then. They always do great though, tons of grapes. I never pick em, I usually just let them rot on the vine. It seemed a shame. So I decided this year to try and turn em into wine. So, can someone tell me why, even with all the rain we're gettn, the grapes are going from green, unripe grapes to raisins in a few days?