What plant hardiness zone is O

O is located at Randolph County, Arkansas (AR), USA.

Plant hardiness zone (winter frost zone or gardening zone) for O is 7a by the USDA scale.

Coldest zone's winter temperature is 0 … +5 °F.

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