Help plant and care for trees in your region, your community, or your yard. Become a PHS Tree Tender! The PHS Tree Tenders® program offers hands-on tree care training for residents of the five-county Philadelphia region. The training covers tree biology, identification, planting, proper care, and working within your community. Available for ISA, PA LA,PLNA, PA Master Gardeners and PA Master Naturalist credit. This course is intended for adults due to the length of the evening classes. The class will be held on three consecutive Thursdays, May 16, 23 and 30 from 6pm-9:15pm. Pizza will be served at 5:45pm for a voluntary donation.