What plant hardiness zone is River Road

River Road is located at Clallam County, Washington (WA), USA.

Plant hardiness zone (winter frost zone or gardening zone) for River Road is 8b by the USDA scale.

Coldest zone's winter temperature is +15 … +20 °F.

Plants of 8b USDA hardiness zone suitable for outdoor gardening and growing in this winter frost zone 8b USDA.