Tips for Pruning Grapevines
Tips for Pruning Grapevines ( Photos: Ms. Forsyth, Montpelier VT) The Secret to Pruning Grapes Here’s the secret: grapevines produce fruit on one-year old wood. What the heck does that mean? When a bud sprouts in spring and grows into a new shoot within the larger grape plant, the shoot turns from green to brown by the end of the growing season, at which point it is considered one-year old wood. The following spring some of the buds on one-year-old wood will grow flowers (which develop into fruit), while the buds on older wood produce only leaves or shoots. The primary goal of pruning is to maximize the amount of one-year old wood on each grapevine without encouraging the plant to produce so many grape clusters that it lacks the energy and nutrients to fully ripen them. Left to its own devices, a grapevine grows to a dense mass of mostly older wood with relatively little “fruiting wood” each year. The dense growth leads to poor air circulation, which encourages fungal disea...