What plant hardiness zone is Portal

Portal is located at Burke County, North Dakota (ND), USA.

Plant hardiness zone (winter frost zone or gardening zone) for Portal is 3b by the USDA scale.

Coldest zone's winter temperature is −35 … -30 °F.

Plants of 3b USDA hardiness zone suitable for outdoor gardening and growing in this winter frost zone 3b USDA.