The Prince George's County Soil Conservation District with the Prince George's County Forestry Board are giving two willow oaks per family. The willow oaks are 1-2' tall seedlings. You must be a Prince George's County resident and the limit is two trees per family. Willow oak is Prince George's County Tree and is one of more hardiest of oaks. It grows up to 60' tall and 40' at the crown. This is a drive-thru event.