What plant hardiness zone is Boy River

Boy River is located at Cass County, Minnesota (MN), USA.

Plant hardiness zone (winter frost zone or gardening zone) for Boy River is 3b by the USDA scale.

Coldest zone's winter temperature is −35 … -30 °F.

Plants of 3b USDA hardiness zone suitable for outdoor gardening and growing in this winter frost zone 3b USDA.

Boy River, Minnesota @ wikipedia.