What plant hardiness zone is New Underwood

New Underwood is located at Pennington County, South Dakota (SD), USA.

Plant hardiness zone (winter frost zone or gardening zone) for New Underwood 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.

New Underwood, South Dakota @ wikipedia.