What plant hardiness zone is Starr School

Starr School is located at Glacier County, Montana (MT), USA.

Plant hardiness zone (winter frost zone or gardening zone) for Starr School is 4a by the USDA scale.

Coldest zone's winter temperature is −30 … -25 °F.

Plants of 4a USDA hardiness zone suitable for outdoor gardening and growing in this winter frost zone 4a USDA.

Starr School, Montana @ wikipedia.