What plant hardiness zone is Richmond Hill
Richmond Hill is located at Queens County, New York (NY), USA.
Plant hardiness zone (winter frost zone or gardening zone) for Richmond Hill is 7b by the USDA scale.
Coldest zone's winter temperature is +5 … +10 °F.
Plants of 7b USDA hardiness zone suitable for outdoor gardening and growing in this winter frost zone 7b USDA.
Richmond Hill, New York @ wikipedia.