What plant hardiness zone is Iron Mountain Lake

Iron Mountain Lake is located at St. Francois County, Missouri (MO), USA.

Plant hardiness zone (winter frost zone or gardening zone) for Iron Mountain Lake is 6a by the USDA scale.

Coldest zone's winter temperature is −10 … -5 °F.

Plants of 6a USDA hardiness zone suitable for outdoor gardening and growing in this winter frost zone 6a USDA.