I have a couple Thompson Seedless grape vines. This is the second year, they didn't do really anything the first year, but this year really took off. They are growing on a small arbor. After reaching the two stages if hight I wanted I pinched them off. The canes have grown to the ends of the arbor and now am getting many side branches off the canes, some are quit long already. My question is in regard to pruning this winter. I know to leave my fruiting wood and the starts for next years fruiting canes. Was wondering about all the side branches that grew of my fruiting wood canes .. should I prune them off or leave them? If pruned, how far back? I added a picture, hope I get a few replies.. Thanks
