HPS/MAG Programs 

We are a hub for gardening! The Philadelphia region has a tradition of gardening going back more than300 years. It continues today with more than 30 gardens, historic landscapes and arboreta within 30 miles of the city.

Important: Click here to view HPS/MAG Refund Policy

Perennial Plant Conference 2025
Friday, October 17, 2025 9:00am - 4:00pm
Swarthmore College, Science Center
500 College Ave, Swarthmore, PA 19081.  

The Perennial Plant Conference is co-sponsored by the Hardy Plant Society/Mid-Atlantic Group, Longwood Gardens, Chanticleer, Pennsylvania Horticultural Society, and the Scott Arboretum and Gardens of Swarthmore College. In-person and Virtual Options available.

Early Bird Registration Deadline: Friday, September 19th

Regular Registraton Dealine: Friday, October 10th

For more information  click here.

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Our enthusiastic and knowledgeable Program Chairperson scouts speakers and topics both nearby, and from across the country. Our lecturers include horticulturalists, authors, researchers and landscape designers.

Upcoming Program Events

September 13, 2025 Still Pond Nursery Wholesale Shopping Day in Boyertown, PA. Click here for details. Members only event.

September 14, 2025 Joint Lecture with Haverford College Arboretum in Haverfore, PA. Guest Speaker: Lucy Dinsmore "Making Stormwater Come Alive" For more information click here.

October 11, 2025 Members’ Wholesale Shopping Day: Sam Brown's Wholesale Nursery in Malvern, PA. Click here for details. Members only event.

October 17, 2025 Perennial Plant Conference at Scott Arboretum & Gardens of Swarthmore College in Swarthmore, PA. HPS/MAG are co-sponors of this event. 

November 9, 2025 Joint Lecture with Scott Arboretum & Gardens of Swarthmore College in Swarthmore, PA.  Guest Speaker: Jenny Rose Carey "A Personal Guide to Bulbs through the Seasons".  For more information click here.

December 7, 2025 HPS Annual Meeting at Temple University Ambler in Ambler, PA. Guest Speaker – Barbara Melera:  "Species Tulips" For more information click here.

January 25, 2026 Walkovic & Schumacher Memorial Lecture 2026 Speaker: Warren Leach“Celebrating Plants in the Winter Garden". For more information click here.

March 21, 2026 March into Spring at Winterthur Museum, Garden & Library in Winterthur, Delaware. Save the date more information to come.