When does the fastest rate of shoot growth typically occur?

• A. During dormancy
• B. Between budburst and flowering
• C. During fruit set
• D. After veraison

Answer: (B)

The vine’s shoots grow fastest during the spring vegetative growth phase, after budburst and up to flowering. At this time temperatures rise and the vine directs energy into rapid elongation of new shoots and leaf expansion, driven by active photosynthesis and favorable hormonal signals. Once flowering begins, resources shift toward flower and later berry development, so the rate of shoot elongation slows. After veraison the vine focuses on berry ripening, and shoot growth remains much slower, with dormancy bringing a halt to growth altogether. So the period between budburst and flowering is when shoot growth is at its peak.