What plant hardiness zone is Fort Severn

Fort Severn is located at Kenora District, Ontario (ON), Canada.

Plant hardiness zone (winter frost zone or gardening zone) for Fort Severn 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.

Fort Severn, Ontario @ wikipedia.