What plant hardiness zone is Hay River

Hay River is located at South Slave Region, Northwest Territories (NT), Canada.

Plant hardiness zone (winter frost zone or gardening zone) for Hay River 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.

Hay River, Northwest Territories @ wikipedia.