Pennsylvania Horticultural Society (PHS) | 8,884 followers on LinkedIn. PHS connects people with horticulture, and together we create beautiful, healthy and sustainable communities. | PHS uses horticulture to advance the health and well-being of the Greater Philadelphia Region. We believe in the power of horticulture to make positive social and environmental change. As a community, we invest our time, passion, and money into public gardens and landscapes that further our cause.