What plant hardiness zone is Madison Lake

Madison Lake is located at Blue Earth County, Minnesota (MN), USA.

Plant hardiness zone (winter frost zone or gardening zone) for Madison Lake 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.

Madison Lake, Minnesota @ wikipedia.