Boundary County, Idaho, ID, USA plant hardiness zones (gardening zones)

Plant hardiness zones (winter frost zones or gardening zones) range for Boundary County, Idaho (ID), USA is:

• 5a
• 5b
• 6a

by the USDA scale.

• coldest zone's winter temperature: −20 … -15 °F

• warmest zone's winter temperature: −10 … -5 °F

Cities of Boundary County, Idaho (ID), USA

• Bonners FerryUSDA hardiness zone: 6a
• EastportUSDA hardiness zone: 5a
• KingsgateUSDA hardiness zone: 5b
• Moyie SpringsUSDA hardiness zone: 6a
• NaplesUSDA hardiness zone: 6a
• PorthillUSDA hardiness zone: 6a
• Smiths FallsUSDA hardiness zone: 5b
• SnydersUSDA hardiness zone: 5b