What plant hardiness zone is Union Gap

Union Gap is located at Yakima County, Washington (WA), USA.

Plant hardiness zone (winter frost zone or gardening zone) for Union Gap is 6b by the USDA scale.

Coldest zone's winter temperature is −5 … 0 °F.

Plants of 6b USDA hardiness zone suitable for outdoor gardening and growing in this winter frost zone 6b USDA.

Union Gap, Washington @ wikipedia.