Pruning the vine before Qingming Festival will have a negative impact on it.

Pruning fruit trees during the dormant period in winter will minimize nutrient loss and is conducive to high yields; pruning fruit trees after germination in spring will cause certain nutrient losses and have a negative impact on the tree.

In most grape-producing areas, grapevines have begun to sprout before Qingming Festival (grapevines in Jiangnan have been sprouting for many days), and the nutrients stored before the leaves fall have been transported to various parts of the tree. Pruning during this period Grapevines waste a lot of nutrients, so try not to prune your vines at this time. However, grapevines that have not yet completed winter pruning can still be pruned at this time (although pruning will waste a certain amount of nutrients, it is much better than not pruning at all).

The best time for winter pruning of grapevines is from about 10 days after the leaves fall in autumn to before February 15th of the Gregorian calendar. It is best not to prune grapevines after late February (in Lunan region).