What plant hardiness zone is Lake Ketchum

Lake Ketchum is located at Snohomish County, Washington (WA), USA.

Plant hardiness zone (winter frost zone or gardening zone) for Lake Ketchum is 8a by the USDA scale.

Coldest zone's winter temperature is +10 … +15 °F.

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

Lake Ketchum, Washington @ wikipedia.