budbreak or budburst, a stage of annual vine development during which small shoots emerge from vine buds in the spring. This process begins the new growing season and signals the end of dormancy, their period of winter sleep. The first sign that budbreak is imminent is bleeding, when the vines begin to drip water from pruning cuts. The buds left at winter pruning begin to swell in the few weeks prior to budbreak, and budbreak itself is marked by the first signs of green in the vineyard, as the first young leaves unfold and push through the bud scales.
