A shortened stub of vine cane.

Vine Spur, also known as a "cane" in some contexts, is a short section of one-year-old wood on a grapevine that has been pruned back to contain only a few buds. Spur pruning is a common viticultural technique used in managing grapevines. The number of buds left on each spur during pruning will depend on the desired vine balance, variety, and viticultural goals, such as controlling yield or optimizing fruit quality.

Spurs are critical in the vine's lifecycle because the buds on these spurs will produce the shoots that grow in the current season, bearing leaves, flowers, and ultimately grapes. The process of selecting and cutting back canes to form spurs is a vital part of winter pruning in many vineyards, especially those using cordon training or similar systems where the vine's permanent structure includes horizontal arms (cordons) extended from the main trunk. In these systems, spurs are maintained along the cordons at regular intervals to ensure productive growth each year.

Effective spur selection and pruning are essential for regulating fruit production, maintaining vine health, and ensuring consistent grape quality over the years. The technique influences various aspects of vine growth, including the amount of sunlight that reaches the fruiting zone and the vine's overall vigor, which in turn affects the quality and quantity of the grape harvest.