Johnson County, Illinois, IL, USA plant hardiness zones (gardening zones)

Plant hardiness zones (winter frost zones or gardening zones) range for Johnson County, Illinois (IL), USA is:

• 6b

by the USDA scale.

• coldest zone's winter temperature: −5 … 0 °F

Cities of Johnson County, Illinois (IL), USA

• BelknapUSDA hardiness zone: 6b
• BolesUSDA hardiness zone: 6b
• BuncombeUSDA hardiness zone: 6b
• CypressUSDA hardiness zone: 6b
• GorevilleUSDA hardiness zone: 6b
• GrantsburgUSDA hardiness zone: 6b
• New BurnsideUSDA hardiness zone: 6b
• OzarkUSDA hardiness zone: 6b
• SimpsonUSDA hardiness zone: 6b
• Tunnel HillUSDA hardiness zone: 6b
• ViennaUSDA hardiness zone: 6b