Allegheny Arboretum
American Public Gardens Association
Awbury Arboretum
Bartram’s Garden
Brandywine Conservancy & Museum of Art
Chanticleer Garden
Hershey Gardens
Jenkins Arboretum & Gardens
Laurel Hill Arboretum
Longwood Gardens
Millbourne
Morris Arboretum
Natural Lands
Pennsylvania Horticultural Society
Philadelphia Zoo
Phipps Conservatory & Botanical Gardens
Pittsburgh Botanic Garden
Scott Arboretum at Swarthmore College
Stoneleigh: a natural garden
Tyler Arboretum
The Arboretum at Penn State
The Bower
