Green text on a white background
In 1976, Philadelphia celebrated it’s bicentennial and to honor that, the Pennsylvania Horticultural Society (PHS) started the “10,000 Trees” project. It was a major tree-planting effort to plant 10,000 trees among 34 Philadelphia area parks between 1973 and 1977. On April 29th, 1977 (Arbor Day), they accomplished their goal and planted the 10,000th tree.
(2019). Ask PHS. Retrieved from http://pennhort.libanswers.com/faq/252808