What plant hardiness zone is St. Isidore

St. Isidore is located at Prescott and Russell Counties, Ontario (ON), Canada.

Plant hardiness zone (winter frost zone or gardening zone) for St. Isidore is 5a by the PHZ Canadian scale.

Plants of 5a PHZ hardiness zone suitable for outdoor gardening and growing in this winter frost zone 5a PHZ.

Also perennial plants from the equivalent USDA zone 4a with coldest winter temperature −34.4 … −31.7 °C and lower can be grown here, see list of plants for 4a USDA winter zone.

St. Isidore, Ontario @ wikipedia.