What plant hardiness zone is Mount Holly
Mount Holly is located at Burlington County, New Jersey (NJ), USA.
Plant hardiness zone (winter frost zone or gardening zone) for Mount Holly is 6b by the USDA scale.
Coldest zone's winter temperature is −5 … 0 °F.
Plants of 6b USDA hardiness zone suitable for outdoor gardening and growing in this winter frost zone 6b USDA.
Mount Holly, New Jersey @ wikipedia.