What plant hardiness zone is Lime Springs

Lime Springs is located at Howard County, Iowa (IA), USA.

Plant hardiness zone (winter frost zone or gardening zone) for Lime Springs 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.

Lime Springs, Iowa @ wikipedia.