Prune vines in spring. Prune vines in March and April. At this time, pruning by wiping buds can erase fine buds, multi-head buds and budding buds, reduce the loss of nutrients and supply all the nutrients to the remaining buds.

Prune vines in summer. Prune vines in June and July in summer. Fruiting branches and vegetative branches should be pitted and slightly treated. In addition, ear shaping, ear alignment, ear thinning and grain thinning should be carried out.

Pruning vines in autumn can be carried out in September-65438+1October. Do a good job of secondary coring, sparse branches, thin branches, overlapping branches and branches with low lignification, adjust the number of branches and improve ventilation.