What plant hardiness zone is Grand Forks AFB

Grand Forks AFB is located at Grand Forks County, North Dakota (ND), USA.

Plant hardiness zone (winter frost zone or gardening zone) for Grand Forks AFB is 4a by the USDA scale.

Coldest zone's winter temperature is −30 … -25 °F.

Plants of 4a USDA hardiness zone suitable for outdoor gardening and growing in this winter frost zone 4a USDA.

Grand Forks AFB, North Dakota @ wikipedia.