Lecture Series

All lectures start at 7:30 p.m.

Vollmer Center Auditorium
Cylburn Arboretum
4915 Greenspring Ave.
Baltimore, MD 21209
Click here for directions

For more information, call: 410-821-5561
or email


Come early to check out our plant raffle and stay for light refreshments after the lecture.

Members are required to be current with their dues for free admission to lectures. Members may bring one guest free of charge.  Admission for non-members is $10 at the door.


Tuesday, March 10, 2020

Carole Bergmann

Botanical Bullies

Invasive species have become one of the 21st century’s significant environmental issues. Some seemingly desirable species–the hardiest, almost carefree, very ornamental and often “Deer Proof” plants–are the most problematic invasive plants. Join forest ecologist and field botanist Carole Bergmann to learn which invasive plants are most challenging in Maryland, and why we should be concerned about them.

Bergmann recently retired as Countywide Botanist and Forest Ecologist for Maryland National Capital Park and Planning Commission. She founded the citizen volunteer-based WEED WARRIOR Program in 1999; to date, trained citizen “Weed Warriors” in one Maryland county alone have contributed more than 43,000 volunteer hours managing invasive plants in public parks. She is an instructor in the Natural History Series for the USDA Graduate School, and regularly teaches classes, lectures, and leads botanical walks for numerous area groups. She is a past president of the Maryland Native Plant Society and serves on the boards of the Maryland Invasive Species Council, the Mid-Atlantic Invasive Plant Council, the Montgomery County Forestry Board, The Maryland Native Plant Society and Montgomery Countryside Alliance.



Tuesday, April 14, 2020

Sam Hoadley

Knockout Natives

Sam Hoadley, manager of horticultural research at Delaware’s Mount Cuba Center, will highlight knockout native species and cultivars from the center’s famous plant trials. Top performers and favorites of Coreopsis, Baptisia, Monarda, Phlox, and Helenium represent some of the best native plants for the Mid-Atlantic region. He will discuss their horticultural and ecological performance and present information on varieties that will make beautiful additions to your garden.

Hoadley’s work includes evaluating native plants in Mount Cuba’s Trial Garden to determine their horticultural and ecological values.  Current genera on trial include Carex, Echinacea, Hydrangea arborescens and Vernonia. He received his degree in Sustainable Landscape Horticulture from the University of Vermont and is an avid gardener with a strong passion for the natural world.

Come early for Putnam Hill Nursery’s annual spring plant sale prior to the lecture!



Tuesday, May 12, 2020

Renny Reynolds

Chasing Eden: The Story of Hortulus Farm

Garden designer and event planner Renny Reynolds spent two years looking for the right property on which to create splendid gardens. He found it in Bucks County, Pa., in the late 1970s. The original 15-acre farm expanded to 100 acres, with 24 gardens open to the public. The place is called Hortulus Farm Nursery and Gardens, the subject of a book by Reynolds and Jack Staub, Chasing Eden: Design Inspiration from the Gardens of Hortulus Farm, to be published in 2020. Reynolds will tell how it all came to be.

Reynolds has a bachelor’s degree in landscape architecture in urban and regional planning from the University of Wisconsin Madison. After touring the world as a travel guide, he moved to New York City and opened a small plant and garden shop in Greenwich Village. Bill Blass was an early client and Reynolds’ design for his terrace was featured in Architectural Digest. Reynolds branched into event planning, doing parties at Studio 54 in its heyday as well as staging events for the Metropolitan Museum of Art, the Museum of Modern Art, Rockefeller Center, the Statue of Liberty and Lincoln Center, among many other venues, and in Monaco, Israel and Turkey.  In 1992 he published the book, The Art of the Party, which some designers still use as their bible. He has also designed many large-scale gardens and landscapes throughout the Northeast and Florida.

Book sale and signing to follow.