What plant hardiness zone is Mill Spring

Mill Spring is located at Polk County, North Carolina (NC), USA.

Plant hardiness zone (winter frost zone or gardening zone) for Mill Spring is 7b by the USDA scale.

Coldest zone's winter temperature is +5 … +10 °F.

Plants of 7b USDA hardiness zone suitable for outdoor gardening and growing in this winter frost zone 7b USDA.

Mill Spring, North Carolina @ wikipedia.