What plant hardiness zone is Alton Bay

Alton Bay is located at Belknap County, New Hampshire (NH), USA.

Plant hardiness zone (winter frost zone or gardening zone) for Alton Bay is 5a by the USDA scale.

Coldest zone's winter temperature is −20 … -15 °F.

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

Alton Bay, New Hampshire @ wikipedia.