What plant hardiness zone is Trout Lake

Trout Lake is located at Dehcho Region, Northwest Territories (NT), Canada.

Plant hardiness zone (winter frost zone or gardening zone) for Trout Lake is 1a by the PHZ Canadian scale.

Also perennial plants from the equivalent USDA zone 0a with coldest winter temperature < −53.9 °C and lower can be grown here.

Trout Lake, Northwest Territories @ wikipedia.