What plant hardiness zone is Willow Creek

Willow Creek is located at Humboldt County, California (CA), USA.

Plant hardiness zone (winter frost zone or gardening zone) for Willow Creek is 9a by the USDA scale.

Coldest zone's winter temperature is +20 … +25 °F.

Plants of 9a USDA hardiness zone suitable for outdoor gardening and growing in this winter frost zone 9a USDA.

Willow Creek, California @ wikipedia.