What plant hardiness zone is Elk River

Elk River is located at Clearwater County, Idaho (ID), USA.

Plant hardiness zone (winter frost zone or gardening zone) for Elk River 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.

Elk River, Idaho @ wikipedia.