What plant hardiness zone is Saint Helens

Saint Helens is located at Columbia County, Oregon (OR), USA.

Plant hardiness zone (winter frost zone or gardening zone) for Saint Helens 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.

Saint Helens, Oregon @ wikipedia.