What plant hardiness zone is Smithfield

Smithfield is located at Johnston County, North Carolina (NC), USA.

Plant hardiness zone (winter frost zone or gardening zone) for Smithfield is 8a by the USDA scale.

Coldest zone's winter temperature is +10 … +15 °F.

Plants of 8a USDA hardiness zone suitable for outdoor gardening and growing in this winter frost zone 8a USDA.