Northwest Territories (Canada), NA. Flin Flon, Manitoba (Canada), Outside Mid-June. Flood Publications lyric springs · USDA John's St. Shelter for Plant Hardiness Zone Map. Below -45.6 C. Fairbanks, Alaska; Resolute, Northwest Territories (Canada). The Plant Hardiness Zones divide the United

States and Canada into 11 areas based on a 10 degree Fahrenheit difference in the average annual minimum. This map supersedes U.S. Department of Agriculture Miscellaneous Publication 814, "Plant Hardiness Zone Map," which was revised

in 1965.. Plant hardiness zones site.. Canadian equivalent to the USDA hardiness zones map.. Canada's Plant Hardiness Site - Going Beyond the Zones.