Mid-Atlantic Regional


2020 Mid-Atlantic Regional Symposium

Perennially Inspired!

Registration is closed for this event.


 Saturday, February 29, 2020  |  8:00a.m. - 4:00p.m.

The Conference Center at Sheppard Pratt

6501 N. Charles Street Baltimore, MD  21204


The Perennial Plant Association and the Horticultural Society of Maryland present another amazing one-day program with four top-notch speakers and lots of opportunities to mingle with fellow perennial lovers. This year's program also includes a private screening of Five Seasons: the Gardens of Piet Oudolf. This event has the potential to sell out so don't delay on making reservations to secure your spot!


Registration is closed for this event.

Fees include coffee, lunch and a private screening of Five Seasons: the Gardens of Piet Oudolf and all program materials.

PPA & HSM Members: $110 by February 1st  |  $130 after February 1st

Non-Members: $130 by February 1st  |  $150 after February 1st

Registration Deadline is February 14th  |  No tickets will be available at the door.


8:00a.m. Registration Opens; Coffee

8:45a.m. Welcome

9:00a.m. Stoneleigh: Biodiversity by Design presented by: Ethan Kauffman (approved for 1 CEU credit through APLD)

Behind a border of towering trees in Villanova, PA, a special place grew from a gentleman’s farm to an elegant country estate. Known simply as Stoneleigh, this spectacular property was donated to Natural Lands, a regional land conservation organization, in 2016. Now in its third act, Stoneleigh recently became the newest public garden in Philadelphia area upon its opening in May of 2018. Ethan Kauffman, Director of Stoneleigh, reveals the rich history of the landscape and provides insight into the process of creating this unique community treasure.


10:00a.m. Five Seasons the Gardens of Piet Oudolf private screening


An immersive and meditative documentary that reveals how the revolutionary landscape designer, Piet Oudolf, upends our conventional notions of nature, public space, and, ultimately, beauty itself.

11:15a.m. Break

11:45a.m. Seeing Gardens through Piet Oudolf's Eyes: Beauty in Unexpected Plant Combinations presented by: Hanna Packer (approved for 1 CEU credit through APLD)

Hanna will share examples of her recent projects working with Piet Oudolf and what she was taught from the master. She will talk about the challenges, success and excitement of working at a large scale installation at a private residence. For nearly a decade, Hanna has been working with Piet on residential projects in New York City and East Coast. As a member of the team, she is responsible for plant procurement and project management.


12:45p.m. Lunch


1:45p.m. Implementing Complexity from Design to Reality presented by: Gregg Tepper and Barbara Katz (approved for 1 CEU credit through APLD)

Receiving a complex planting plan from world class garden designer Piet Oudolf is a very exciting milestone in the life of any public garden.  But preparing the site, sourcing each and every plant, and coordinating a volunteer effort, (with volunteers from far and wide), to implement the design and find the right placement for 65,000 plants, is an altogether different challenge.  Gregg and Barbara will discuss the details of bringing this type of design to life and some of the many memorable lessons learned.


2:45p.m. The Butterfly Effect: Micro Plantings for Macro Impact presented by: Jared Barnes (approved for 1 CEU credit through APLD)

Small plants can have a big impact. In this presentation, Dr. Jared Barnes shows how specific micro plants can have a macro impact in your garden.


3:45p.m. Closing remarks


The four speaker presentations have been approved for 1 CEU credit each through APLD. Sign-in sheets will be available at the start of each session and certificates will be emailed by March 20th.


The Symposium has also been approved for 1 total credit for the Maryland Certified Professional Horticulturist Program (CPH).


Ethan Kauffman is a public garden professional and horticulturist.  He currently serves as the director of Stoneleigh: a natural garden, a 42-acre former estate located in Villanova, PA, which opened to the public in May of 2018.  At Stoneleigh, he enjoys creating a garden experience that inspires others to garden for beauty, biodiversity and ecological function.  Previously, he served as director of Moore Farms Botanical Garden, where he led the transition from a private pleasure garden to a non-profit botanical garden.  Ethan believes that horticulture connects us to the natural world, and exploring this relationship is vital to understanding and defining our place in it.  

Hanna Packer, APLD, is an award-winning landscape designer known for creating stunning gardens that are harmonious, sophisticated, and functional. Her projects benefit from direct involvement at all phases,  from design through installation and upkeep. Hanna’s work has been honored with top awards and featured among the pages of design magazines including Architectural Digest and Dwell, as well as landscape specialty books. Hanna is passionate about sustainable landscape design and how it can help fight global warming. She is currently Principal of Hanna Packer Design Inc. In addition, Hanna helps to educate the next generation of landscape designers as well. She is an instructor at The New York Botanical Garden and has taught classes for aspiring landscape designers, including green roof design, green wall design and city roof design for the past 10 years. 

Babara Katz has been workign in the landscape industry for over 30 years. She is the owner of London Landscapes LLC, a design & build company.  While living in England, she studied with John Brookes, and then joined Blooming Gardens UK, as the principal designer.  Upon her return to the States in 1986, she created London Landscapes and began crafting gardens throughout the areas of Maryland, DC and Virginia.  She is known for her knowledge of the full range of plants for successful gardens in these areas, but perennials are her passion.  Her gardens have been published in numerous magazines including Southern Living, Better Homes and Gardens, and Country Living.  She has served on the board of the Landscape Contractors Association MD DC VA and was President of the Landscape Designers Group for several years.

Gregg Tepper is a professional horticulturist, lecturer, consultant and life-long native plant enthusiast. After studying Ornamental Horticulture at the University of Delaware and several years creating his own ornamental and native plant gardens, Gregg started a horticultural maintenance business designing and managing private gardens in the Delaware Valley. Thereafter Gregg worked at Mt. Cuba Center in Hockessin, DE where he held the positions of Horticulturist, Woods Path Horticulturist and Director of Horticulture. From there he was Director of Horticulture and board member of Delaware Botanic Gardens in Dagsboro, DE where he was instrumental in developing the initial gardens including a two-acre meadow designed by world-renown garden designer Piet Oudolf.  Thereafter, he accepted a position as Horticulturist at the historic Laurel Hill and West Laurel Hill Cemeteries in Philadelphia, PA. He has lectured extensively in the United States and the Royal Botanic Gardens, Kew and Wisley in Great Britain. Gregg volunteers annually as a horticulture entry passer atat the Philadelphia Flower Show as well as with the Watering Committee.  Gregg never misses a chance to pursue botanizing excursions, where he photographs and studies plant communities, throughout the year.

Jared Barnes, Ph.D., started gardening when he was five years old, and since then he has enthusiastically pursued how to best cultivate plants and cultivate minds.  He currently fulfills those passions as an assistant professor of horticulture at Stephen F. Austin State University. He obtained his Ph.D. in horticultural science from North Carolina State University; he interned the summer of 2008 at The Scott Arboretum of Swarthmore College; and he has travelled around the US and into eleven countries to gain a national and global perspective of horticulture. Recent awards include the 2019 Perennial Plant Association’s Academic Award, the 2017 Keep Nacogdoches Beautiful Sustainability Award, the 2016 Perennial Plant Association’s Young Professional of the Year, and a member of GPN’s 2016 Class of 40 Under 40.

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