What plant hardiness zone is Big Horn

Big Horn is located at Sheridan County, Wyoming (WY), USA.

Plant hardiness zone (winter frost zone or gardening zone) for Big Horn is 4b by the USDA scale.

Coldest zone's winter temperature is −25 … -20 °F.

Plants of 4b USDA hardiness zone suitable for outdoor gardening and growing in this winter frost zone 4b USDA.

Big Horn, Wyoming @ wikipedia.