What plant hardiness zone is Charleston

Charleston is located at Penobscot County, Maine (ME), USA.

Plant hardiness zone (winter frost zone or gardening zone) for Charleston 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.