Grapes sit squarely on the list of plants you shouldn't prune in the fall, but mature and established vines should be pruned yearly during winter after all leaves have dropped. A good pruning time ...

In summer, shorten non-flowering laterals to four or five leaves and sideshoots growing from these to one leaf. Prune laterals carrying ... and fruit the next, after which they are exhausted ...

This plant needs summer pruning to restrain growth and also to maintain the short sideshoots on which the flowers develop. During early July, about two months after flowering, prune sideshoots and ...