What plant hardiness zone is Sugar Hill

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

Plant hardiness zone (winter frost zone or gardening zone) for Sugar Hill 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.

Sugar Hill, New Hampshire @ wikipedia.