What plant hardiness zone is Upper Marlboro

Upper Marlboro is located at Prince George's County, Maryland (MD), USA.

Plant hardiness zone (winter frost zone or gardening zone) for Upper Marlboro is 7a by the USDA scale.

Coldest zone's winter temperature is 0 … +5 °F.

Plants of 7a USDA hardiness zone suitable for outdoor gardening and growing in this winter frost zone 7a USDA.