The lowdown on vineyard frost

摘要

The Bureau of Meteorology defines a frost as 'a deposit of soft white ice crystals or frozen dew drops on objects near the ground, formed when the surface temperature falls below freezing point'.As viticulturists, we generally expand this definition to a freezing event that causes damage to the grapevine tissue.The damage a frost may cause to grapevines will depend on the temperature and length of time below freezing, among other factors.