The Pennsylvania Horticultural Society


McLean Library

100 North 20th Street
Philadelphia, PA 19103
215-988-8782 voice
215-988-8783 fax

9:30 am - 5:00 pm, Monday - Friday. Special collections -- by appointment only.


The Pennsylvania Horticultural Society is a private, non-profit organization, headquartered in downtown Philadelphia. Formed shortly after PHS's founding in 1827, the McLean Library reflects American horticultural trends both historically and currently. It serves the needs of amateur and professional horticulturists, landscape architects, garden historians, and researchers. It is used by the public and by the Society's members and volunteers. The collection supports the horticultural and urban greening activities of the staff.

The Delaware Valley is known as "America's Gateway to Gardens" and has a long tradition of intense interest in gardens and arboreta of every size and kind. The library's Pennsylvania Collection reflects the Mid-Atlantic region's horticultural history. The McLean Library houses a rich collection of Delaware Valley seed and nursery catalogs, 1860-1950. The Mary Helen Wingate Lloyd Collection consists of significant European and American gardening imprints from the 16th-20th centuries. The library houses the archives of the Philadelphia Flower Show and the Society, as well as the archives of local gardening concerns such as the Rittenhouse Flower Market, and local garden club activities. The library also houses nearly 30,000 images of the Philadelphia Flower Show, pre-World War II estate gardens of the Philadelphia area, and garden and landscape images from around the world, 1930's-1960's.