1939
Year the American holly was designated the official state tree
166
Height in feet of the state’s tallest tree, a tulip poplar at Winterthur Museum, Garden and Library
106
The spread in feet of the state’s largest tree, a zelkova located in Greenville
89
Height in feet of the state’s largest scrub pine (Sussex County)
560
Age in years of the state’s oldest tree, a bald cypress
16
Certified Tree City USA communities in Delaware
41
Invasive tree species in Delaware
30
Percent of land in Delaware covered by forest