What plant hardiness zone is New London

New London is located at Merrimack County, New Hampshire (NH), USA.

Plant hardiness zone (winter frost zone or gardening zone) for New London is 5b by the USDA scale.

Coldest zone's winter temperature is −15 … -10 °F.

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

New London, New Hampshire @ wikipedia.