What plant hardiness zone is Cottage Lake

Cottage Lake is located at King County, Washington (WA), USA.

Plant hardiness zone (winter frost zone or gardening zone) for Cottage Lake 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.

Cottage Lake, Washington @ wikipedia.