What plant hardiness zone is Rocky Harbour

Rocky Harbour is located at Division No. 9, Northern Peninsula-St. Anthony, Newfoundland and Labrador (NL), Canada.

Plant hardiness zone (winter frost zone or gardening zone) for Rocky Harbour is 4b by the PHZ Canadian scale.

Plants of 4b PHZ hardiness zone suitable for outdoor gardening and growing in this winter frost zone 4b PHZ.

Also perennial plants from the equivalent USDA zone 3b with coldest winter temperature −37.2 … −34.4 °C and lower can be grown here, see list of plants for 3b USDA winter zone.

Rocky Harbour, Newfoundland and Labrador @ wikipedia.