When should my grapes start changeing
I live in Mn zone 4 and its just about september and my grapes haven't started to change yet? It has been real hot this months with temps about 15 degrees over average and in the 90's. The vines seem to be healthy and some of the grapes have brown marks on the but look good and solid. We haven't had any rain for about 3 weeks in my area but grapes seem to be doing good and we have clay soil for the most part which does hold water better than most soils. Will they start to change once the temps start to drop? Please let me know so I don' worry about them so much and this is in a back yard.