 After bud break, the young shoots are very vulnerable to frost damage with vineyard managers going to great lengths protect the fragile shoots should temperature dramatically drop below freezing.This can include setting up heaters or wind circulators in the vineyard to keep cold air from settling on the vines.Depending on temperatures, 40–80 days after bud break the process of flowering begins with small flower clusters resembling buttons appearing on the tips of the young shoots.