What plant hardiness zone is Saint Charles

Saint Charles is located at Bear Lake County, Idaho (ID), USA.

Plant hardiness zone (winter frost zone or gardening zone) for Saint Charles 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.