Downward bending of approximately 5-10% of shoots occurred from around 4 days after 1 week until mid June and of about 3-5 weeks later on. All grapes require heavy pruning to produce fruit, but after the first three growing seasons, different types of grapes need different methods of pruning. [10]. After the leaves fall from the vine, these smooth, tan or brown woody vine parts are called canes. Wine grapes and muscadines usually need spur pruning, and American grapes, such as Concord and Thompson Seedless, require cane pruning. 8 Tendrils: These are the climbing organs of the grapevine. The leafy foliage of a grapevine's canopy will be dependent on the particular grape variety and its propensity for vigorous growth. vines to continue new growth from lateral shoots, thereby creating increased canopy density and requiring further hedging or removal of leaves or lateral shoots. document.write(today.getFullYear());