Vincabulary – Vineyard Cycles

“Grapevines are deciduous plants. In late autumn, triggered by short days, petioles detach from the shoot and leaf drop occurs. The vines can no longer manufacture carbohydrates through the process of front-vineyard-046_editedphotosynthesis and are storing carbohydrates in the form of starch. This dormant state will continue until daylight hours and temperatures increase in spring, when axial buds that were formed before dormancy become activated to break.”

Increasing temperature and photoperiod in early spring stimulate dormant buds to swell and open. The vine uses the starch it stored in the autumn as the carbohydrate source for these young leaves until they can photosynthesize efficiently”.-  Source U.C. DAVIS

About virginiawineclub

Chairman Virginia Wine Club Tasting Panel Editor, Virginia Wine Journal
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