Well if they're newly planted, you're likely to lose the grapes already on the vine if it becomes stressed from the planting, though it will not hurt to leave both the foliage and fruit on the vine. If you would like information on pruning them back, however, this article will help: https://www.gardeningknowhow.com/edible/fruits/grapes/prune-grape-vine.htm
Answered on July 27, 2015
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