What plant hardiness zone is King Arthur Park

King Arthur Park is located at Gallatin County, Montana (MT), USA.

Plant hardiness zone (winter frost zone or gardening zone) for King Arthur Park 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.

King Arthur Park, Montana @ wikipedia.