HPS/MAG Programs 

We are a hub for gardening! The Philadelphia region has a tradition of gardening going back more than 300 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

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 HPS/MAG Programs:

September 13, 2026 3:00pm - 4:00pm Joint Lecture at Haverford 2026: George Coombs: Trees for a Changing Climate. To register and details Click Here.

November 15, 2026 2:00pm - 3:30pm  Joint Lecture with Scott Arboretum & Gardens and The Pennsylvania Horticultural Society. Beronda L. Montgomery: When Trees Testify: Science, Wisdom, History and America’s Black Botanical Legacy.  Registration opens September 14. Click here for details.

December 7, 2026 1:00pm - 3:00pm 2025 HPS/MAG Annual Meeting & Lecture. Guest Speaker – Barbara Melera:  "Species Tulips".  To register and details Click Here.

January 25, 2026 2:00pm - 3:30pm Walkovic & Schumacher Memorial Lecture 2026: Warren Leach. Registration will open shortly. For details Click Here.

March 21, 2026 8:00am - 5:00pm March into Spring XXIX – A Symposium for Gardeners “From Passion to Practicality: The Many Dimensions of Gardening”. Registration is open. To register and more details about the day Click Here.

2026 Winter Virtual Lecture Series

"Tuesdays@10" and "Virtual Wednesday Evenings" are Educational Series of Virtual Lectures held alternating weeks, every week during the first quarter of every year. They feature a wide range of topics with horticultural experts, organizations and authors. 

Registration opens November 15th after 8:00pm.

Tuesdays@10 

January 6, 2026 “Native Ferns” with Kevin Kelly. Click here for details. This is a Member and Non-Member Event.

January 20, 2026 “Calder Gardens” with Erin Monda. Click here for details. This is a Member and Non-Member Event.

February 3, 2026  “Native Bees” with Angela Hartley. Click here for details. This is a Member and Non-Member Event.

Virtual Wednesday Evenings

January 14, 2026 Winter Virtual Series – Wednesday Evenings: More information to come.

January 28, 2026 – “Seed Saving” with Emily Baisden. Click here for details. This is a Member and Non-Member Event.

February 11, 2026 – “Mini-Forests” with Hannah Lewis. Click here for details. This is a Member and Non-Member Event.

Februay 17, 2026 Winter Virtual Series- Tuesdays at 10: More information to come.

February 25, 2026 – “Ornamental Grasses” with Thom Mrazik. Click here for details. This is a Member and Non-Member Event.

"Tuesdays@10" and "Virtual Wednesday Evenings" are Educational Series of Virtual Lectures held alternating weeks, every week during the first quarter of every year. They feature a wide range of topics with horticultural experts, organizations and authors. 

Tuesday@10 Previous Topics

• Houseplants
• Peonies
• New & Underused Woody Plants
• Seed Saving Made Simple
• Cool Season Grasses
• Delightful Dahlias
• The Wonderful World of Conifers
• Snowdrops for the Winter Garden
• PHS: Beyond the Flower Show
• The Cutting Garden
• Fundamentals of Pesticides and Risk Assessment
• Discover Warm Season Grasses

• Book Talk with Jenny Rose Cary
• The Unique Rock Garden at Laurel Hill Cemetery
• Should I Consider a Water Feature in my Garden?
• Clematis Culture, Pruning and Training
• Enjoying Succulents in Your Garden
• Growing Carnivorous Native Plants in a Container
• Rare Finds and Exceptional Specimens: Preserving America’s Finest Native Rhododendrons

The HPS/MAG traditional annual itinerary of Speaker Programs.

With the exception of our spring symposium, most lectures are free to our members. The Walkovic & Schumacher Memorial Lecture and Haverford lectures are open to the public.  We offer most speaker programs as Hybrid Events. This type of event offers greater flexibility for attendance - the registrants have the option of attending in-person, or virtually.

January - The Walkovic & Schumacher Memorial Lecture, is a annual collaboration with the Scott Arboretum & Gardens of Swarthmore College. Recent speakers have included Tony Avent, Plant Delights Nursery; Dan Heims, Terra Nova Nursery; author Ken Druse: and writer and radio host Jessica Walliser. 

March - Our March Into Spring Symposium features up to 5 lectures, along with a fabulous silent auction, and vendors featuring plants, apiary products and garden gear. It is a Virtual Event, if necessary, and includes an Online Auction.

October - November - The Haverford Lecture is co-sponsored with the Haverford Arboretum. Recent speakers have included Carrie Preston, Studio Toop; Larry Weaner, Larry Weaner Landscape Associates; ecologist and conservationist Joan Maloof; and Kirk Brown as Frederick Law Olmstead.

November - The Scott Arboretum Lecture is co-sponsored with the Scott Arboretum & Gardens. Recent speakers have included Senior Horticulturist for Laurel Hill Cemeteries, Gregg Tepper.  

November - December - We now offer a lecture following our annual business meeting. Speakers have included Jules Bruck, Associate Professor of Landscape Design at the University of Delaware, historian and author Marta McDowell, landscape architect Susan Cohen, and "The Herb Lady", Caren White.

Contact HPS/MAG Programs Chair at [email protected]