Attached is the Winter Grape Bud Hardiness results for late December. The hardiness levels were determined as average lethal temperature exotherms (LTE) measured on buds of several varieties by region collected on December 21th and 22th in the Okanagan Valley.
Note - empty spaces in the chart are due to heavy snow and lack of access to vines.
Prepared by Carl Bogdanoff
Agriculture and Agri-Food Canada,
Summerland Research & Development Center Wine Grape Research