PHS is the premier source of horticultural knowledge and expertise.

Serving a diverse audience of gardeners and plant lovers at all levels, PHS provides experiential learning opportunities for thousands of people and presents speakers and experts of national and international stature. 

PHS offers a range of programming and award-winning initiatives, including PHS Tree Tenders and PHS Garden Tenders, Plant One Million, PHS City Harvest, and the PHS Philadelphia Flower Show.

At the PHS Philadelphia Flower Show each March, attendees have the opportunity to attend educational presentations offered at venues within the Show, all as part of the price of admission. Speakers of national and international renown give informative and inspiring talks on a variety of horticultural topics.

Learning Programs

Classes & Workshops

Educational opportunities with PHS will develop your talents in a variety of fields, and help shape new skills and interests.

Classes taught by PHS horticultural experts and partner organizations include tree planting and pruning, floral design, stormwater management, making compost tea, and garden pest management. Workshops also explore the culinary arts, and participants can learn to use fresh ingredients from their gardens for delicious sauces, drinks and dishes. Or try your hand at botanical illustration and creating art from nature.

Opportunities to participate in volunteer workdays, fascinating trips, and garden tours are also offered in the wide range of programs. Read More.


PHS offers an extensive menu of gardening programs providing numerous options for everyone, from beginning gardeners to professionals. Year-round offerings include demonstrations, workshops, exclusive garden visits, conferences, and lectures. We have expanded our menu of exciting international trips and tours of exclusive gardens. Read More.

These programs build strong commitment to PHS among members and help cultivate new members and donors.

PHS Garden Tenders is a training course for those interested in starting community gardens on vacant lots, in parks, around schools and churches, or other locations. PHS Garden Tenders is open to groups, individuals, educators, and anyone interested in gardening with others.

Participants in Garden Tenders gain hands-on gardening experience and learn how to establish successful, self-sustaining community gardens. Introductory topics include basic horticulture, finding a site, recruiting and keeping volunteers, assessing and finding resources in your neighborhood, planting and garden maintenance, and forming partnerships.

PHS Gold Medal Plants

Since its inception in 1979, the PHS Gold Medal Plant Award program has recognized trees, shrubs, and woody vines of outstanding merit. Read More.

A volunteer Gold Medal Committee of horticulturists meets annually to evaluate and select PHS Gold Medal plants for their superb eye-appeal and performance in the USDA Hardiness Zones 5 through 7. Many winners are hardy in a broader geographic range. PHS Gold Medal Plants provide beauty in many seasons through their foliage, flower, form, or bark.

GROW Magazine

GROW, the magazine of the Pennsylvania Horticultural Society, provides an insider’s view of the amazing plants, fascinating gardeners, beautiful places, latest products, and inspiring ideas and designs emerging in the world of horticulture. Read More.

GROW celebrates the exceptional people and programs of PHS, bringing to life the organization’s mission of gardening, greening and learning. A subscription to the magazine, which is available in print or digital editions, is one of the exclusive benefits of membership in PHS.

GROW is one of the exclusive benefits of PHS membership, and informs and entertains readers of all gardening levels and interests. We welcome your story ideas and suggestions for this great new chapter for PHS.

The PHS McLean Library

The PHS McLean Library is the nation’s oldest horticultural library, with a collection of 15,000 books and DVDs on gardening, plant care, botany, and urban greening. Serving PHS and the gardening public, its collection includes rare gardening books, seed and nursery catalogs, and the archives of the Pennsylvania Horticultural Society. Through a recently formed library consortium with Longwood Gardens and the Mt. Cuba Center McLean Library now offers thousands of eBooks for digital borrowing. Read More.

The library hosts reading groups, children’s story times, tours, and programming related to the rare book and special collections. In addition to producing an online “Ask PHS” database and numerous web-based subject guides the library staff curates changing exhibits in a newly created gallery space in the renovated library.

PHS Subject Guides

PHS is committed to making you the best gardener you can be! As such, the PHS McLean Library staff carefully cultivates subject guides on a variety of topics. Read More.

Stories from the Garden

The PHS McLean Library book discussion group meets on the first Thursday evening of the month, October through June. Join us in reading and discussing works of fiction or non-fiction having to do with gardening, plants, nature, or the land. Read More.

PHS Kids Story Time

Bring your little ones to PHS Kids Story Time for an hour of fun and learning! Children ages 3 to 6 (with an adult) are invited to discover gardening and the natural world through books. Read More.

Junior Flower Show

The Junior Flower Show is a free program for students from pre-school through high school that fosters an awareness of horticulture and the natural environment among youth and encourages active participation in growing, gardening, and sustainable practices for school-age children in the greater Philadelphia region. Read More.

The 2016 Junior Flower show theme is National Treasures, which celebrates the centennial of the National Park Service and our country’s majestic landscapes, rich history, and vibrant culture. PHS is proud to partner with the National Park Service in this effort to expose the next generation to our nation’s treasures and landscape.