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Pruning Grapes in Home Gardens: Some Basic Guidelines J. King, WSU – Mount Vernon
Standing in front of a mass of tangled grape vine and wondering what to do with it can be a scary experience for the novice or even for the more experienced pruner. Keep in mind two essential ideas:
1. Don't be afraid to cut. When you finish, about 90% of last year's growth will be cut.
2. Grape plants are vigorous, and forgiving. Even if you make a mistake, you'll get a chance to fix it next year. With that said, you can approach your pruning in a spirit of learning and adventure, not panic. Grapes are best pruned in spring (February/March, or even as late as early April) because if pruned too early a hard frost in late winter can damage the canes and buds.