What plant hardiness zone is South Heart

South Heart is located at Stark County, North Dakota (ND), USA.

Plant hardiness zone (winter frost zone or gardening zone) for South Heart 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.

South Heart, North Dakota @ wikipedia.