What plant hardiness zone is Dease Lake

Dease Lake is located at Regional District of Kitimat-Stikine, British Columbia (BC), Canada.

Plant hardiness zone (winter frost zone or gardening zone) for Dease Lake is 2a by the PHZ Canadian scale.

Also perennial plants from the equivalent USDA zone 1a with coldest winter temperature −51.1 … −48.3 °C and lower can be grown here.

Dease Lake, British Columbia @ wikipedia.