What plant hardiness zone is Silver Firs

Silver Firs is located at Snohomish County, Washington (WA), USA.

Plant hardiness zone (winter frost zone or gardening zone) for Silver Firs 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.

Silver Firs, Washington @ wikipedia.