Northumberland County, Ontario, ON, Canada plant hardiness zones (gardening zones)

Plant hardiness zones (winter frost zones or gardening zones) range for Northumberland County, Ontario (ON), Canada is:

• 5b
• 6a
• 6b

by the Canadian PHZ scale.

Cities of Northumberland County, Ontario (ON), Canada

• BewdleyPHZ hardiness zone: 5b
• BinbrookPHZ hardiness zone: 6b
• BrightonPHZ hardiness zone: 6a
• CampbellfordPHZ hardiness zone: 5b
• CobourgPHZ hardiness zone: 6a
• ColbornePHZ hardiness zone: 6a
• GraftonPHZ hardiness zone: 6a
• HarwoodPHZ hardiness zone: 5b
• HastingsPHZ hardiness zone: 5b
• Port HopePHZ hardiness zone: 6a
• Port Hope and HopePHZ hardiness zone: 6a
• RoseneathPHZ hardiness zone: 5b
• WarkworthPHZ hardiness zone: 5b