Grapes contribute more than $5 billion per year to the economy of the eastern United States, and the grape and wine industries have been expanding rapidly in those regions. However, the sustainability of profitable yet cold-sensitive cultivars is limited by climatic constraints, primarily lethal freezing temperatures that can drop well below 0° F. The severe economic losses that result from freezing injury continue to be a major setback for the continuous growth of the grape and wine industries in this region.
News Article by Imed Dami. Wines & Vines. January 2017.
Read more at Cold Hardiness Measurement