Choose one fruiting cane for the following year. Select one close to the trunk head that is firm, has buds to produce enough grapes on one branch, and looks healthy. Ensure that its position on the vine exposes the cane to the sunlight. Mark this cane with a colorful ribbon to avoid cutting it by mistake.
Identify the cane that will be the grapevine's renewal spur. This cane should also be close to the trunk head and exposed to the sun. Prune it to two buds.
Cut back all remaining canes. Your vine will have both fruiting canes and suckers, or shoots that grow straight from the base of the vine. Prune the fruiting branches to the number of buds you want to keep. Then, remove the suckers and their buds on the base of the grapevine. Trim off the vine's tendrils.
Tie the fruiting canes with string to the vine's wire trellis.