What plant hardiness zone is Nine Mile Falls

Nine Mile Falls is located at Spokane County, Washington (WA), USA.

Plant hardiness zone (winter frost zone or gardening zone) for Nine Mile Falls is 6b by the USDA scale.

Coldest zone's winter temperature is −5 … 0 °F.

Plants of 6b USDA hardiness zone suitable for outdoor gardening and growing in this winter frost zone 6b USDA.

Nine Mile Falls, Washington @ wikipedia.