Slope County, North Dakota, ND, USA plant hardiness zones (gardening zones)

Plant hardiness zones (winter frost zones or gardening zones) range for Slope County, North Dakota (ND), USA is:

• 4a

by the USDA scale.

• coldest zone's winter temperature: −30 … -25 °F

Cities of Slope County, North Dakota (ND), USA

• AmidonUSDA hardiness zone: 4a
• MarmarthUSDA hardiness zone: 4a