Pruning Mature Vines

In early spring, remove the fruiting canes from the previous year. Tie one of the two canes from the renewal spur to the trellis wire and cut after the 10th bud. Cut the remaining cane to two buds for next year's renewal spur.

Continue this pattern of choosing fruiting canes and renewal spurs each season, adjusting the number of buds on each fruiting arm. Too many buds results in poor fruit quality and vegetative growth. A shortage of buds reduces the crop.

Grape buds vary greatly in fruitfulness. The most productive buds form at the top of the trellis where the shoots of the previous season were exposed to the most light. The distance between leaves should be about 6 inches, and the diameter of the cane between the leaves should be 1/4 inch or more.

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