What plant hardiness zone is Orford

Orford is located at Grafton County, New Hampshire (NH), USA.

Plant hardiness zone (winter frost zone or gardening zone) for Orford is 4b by the USDA scale.

Coldest zone's winter temperature is −25 … -20 °F.

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