What plant hardiness zone is North Cascades Natl Park

North Cascades Natl Park is located at Skagit County, Washington (WA), USA.

Plant hardiness zone (winter frost zone or gardening zone) for North Cascades Natl Park is 5b by the USDA scale.

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

Plants of 5b USDA hardiness zone suitable for outdoor gardening and growing in this winter frost zone 5b USDA.