What plant hardiness zone is Glad Valley

Glad Valley is located at Ziebach County, South Dakota (SD), USA.

Plant hardiness zone (winter frost zone or gardening zone) for Glad Valley 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.

Glad Valley, South Dakota @ wikipedia.