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The Pennsylvania Horticultural Society
Our Mission: The Pennsylvania Horticultural Society motivates people to improve the quality of life and create a sense of community through horticulture.

The Pennsylvania Horticultural Society (PHS) is a nonprofit membership organization founded in 1827. Under the leadership of Drew Becher, PHS provides great events, activities, and publications for novice gardeners, experienced horticulturists, and flower lovers of all ages.

PHS also produces and manages a variety of shows, competitions, and programs, including:

  • The Philadelphia International Flower Show, the largest indoor flower show in the world.
  • Proceeds from the Philadelphia International Flower Show support PHS's programs, including neighborhood and public landscape greening projects through Philadelphia Green.
  • PHS offers many services, including garden tours and publications.
  • Kids Grow Expo 
  • City Gardens Contest


Visiting Information

PHS headquarters is located at 20th & Arch Streets in Philadelphia, Pennsylvania. Inside are administrative offices, as well as our library, which houses the most extensive collection of horticultural books in the Greater Philadelphia Region.

For more information about PHS:

The Pennsylvania Horticultural Society
100 N. 20th Street
5th Floor
Philadelphia, PA 19103-1495

Phone: 215-988-8800
Fax: 215-988-8810
Online Customer Service E-mail: