Manor View Nursery (now closed), 3321 Columbia Avenue, Lancaster PA
With a trunk diameter of 5 feet 9 inches, a height of 111 feet, and a branch spread of 83.5 feet (as measured in 2018), this is the second largest elm on record in Pennsylvania. As noted by arboriculturist John Rosenfeld, this elm could be old enough that the Continental Congress passed beneath its boughs enroute from Lancaster to York in 1777. To have survived so long, the tree may be among the 1 in 100,000 American Elms that are tolerant of Dutch Elm Disease.
This amazing species is insensitive to length of daylight (i.e., photoperiod) and continues to grow well into autumn until injured by frost.