TreePhilly: The city site for tree information including existing tree removals and pruning requests
Pennsylvania Horticultural Society Tree Tenders Program. Find out about upcoming Tree tender classes and check out the urban forest cloud.
Philly Tree People
East Falls Tree Tenders
Queen Village Tree Tenders
South Kensington Community Partners
Northern Liberties Neighbors
Tree Authority LLC
Other vendors can be found on the TreePhilly.org Site
Additional Videos are here.