What plant hardiness zone is Spring Grove

Spring Grove is located at Roberts County, South Dakota (SD), USA.

Plant hardiness zone (winter frost zone or gardening zone) for Spring Grove is 4a by the USDA scale.

Coldest zone's winter temperature is −30 … -25 °F.

Plants of 4a USDA hardiness zone suitable for outdoor gardening and growing in this winter frost zone 4a USDA.