What plant hardiness zone is Raleigh Hills

Raleigh Hills is located at Washington County, Oregon (OR), USA.

Plant hardiness zone (winter frost zone or gardening zone) for Raleigh Hills 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.

Raleigh Hills, Oregon @ wikipedia.