Winter Seminar

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~  Registration for this event is now closed.  ~

Perennial Plant Association & Horticultural Society of Maryland present:

Perennially Inspired!

Saturday, February 29, 2020|8 a.m. – 4 p.m.

The Conference Center at Sheppard Pratt
6501 N. Charles Street, Baltimore, MD 21204

Join us for another amazing one-day program with five top-notch speakers and lots of opportunities to mingle with fellow perennial lovers. This year’s program also includes a private screening of the award-winning 2017 documentary, Five Seasons: The Gardens of Piet Oudolf.

EARLY BIRD DEADLINE IS FEBRUARY 1 – Seating is limited, register today!

Earlybird Deadline








Fees and Registration

Fee includes coffee and pastries, lunch and refreshments.

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

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

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

See below for a link to register online or to download and print a mail-in application.

Registration cancellation and refund requests must be made in writing to by February 14, 2020. A refund of all fees, minus a $50 administrative fee, will be given for cancellations by that date. After February 14, there will be no refunds.

One CEU credit for each session is available through the Association of Professional Landscape Designers (APLD).  Sign-in sheets will be available at the start of each session and certificates will be emailed on March 20.

This seminar has been approved for one Maryland CPH (Certified Professional Horticulturist Program) CEU credit.  

For questions, please contact us at


8 a.m.  –  Registration opens, coffee and pastries

8:45 a.m.  –  Welcome remarks

9 a.m.

Ethan Kauffman

Stoneleigh: Biodiversity by Design

Ethan Kauffman, a public garden professional and horticulturist, is the director of Stoneleigh, the newest public garden in the Philadelphia area. In his talk, he will reveal “the rich history of the landscape” and provide “insight into the process of creating this unique community treasure.” Stoneleigh, in Villanova, Pa., opened in 2018.

Previously, Kauffman was director of Moore Farms Botanical Garden in Lake City, S.C., where he led the transition from a private pleasure garden to a non-profit botanical garden. Kauffmann believes that horticulture connects us to the natural world, and exploring this relationship is vital to understanding and defining our place in it.

(Approved for 1 Credit through APLD)

10 a.m.

Five Seasons:  The Gardens of Piet Oudolf

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.

To learn more about this film, go to

11:15 a.m.  –  Break

11:45 a.m.

Hanna Packer

Seeing Gardens through Piet Oudolf’s Eyes: Beauty in Unexpected Plant Combinations

Hanna Packer, principal of Hanna Packer Design Inc. in Great Neck, N.Y., has worked with Piet Oudolf on residential projects in New York and elsewhere on the East Coast. As a member of Oudolf’s design team, Packer is responsible for plant procurement and project management. In her talk, Packer will share examples of her recent projects working with Oudolf and what she learned from the master. She will talk about the challenges, success and excitement of working at a large-scale installation at a private residence.

Packer 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. She is passionate about sustainable landscape design and how it can help fight global warming. 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. For examples of her work, see

(Approved for 1 Credit through APLD)


12:45 p.m. – Lunch

1:45 p.m.

Greg Tepper & Barbara Katz

Implementing Complexity from Design to Reality

Piet Oudolf’s design for the two-acre meadow at Delaware Botanic Gardens at Pepper Creek will be discussed by landscape designer Barbara Katz and Gregg Tepper, the garden’s former director of horticulture. According to them, “Receiving a complex planting plan from … Piet Oudolf is a very exciting milestone in the life of any public garden. But preparing the site, sourcing each … 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.” They will share details of bringing the design to life, including “some of the many memorable lessons learned.”

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, Tepper started a horticultural maintenance business designing and managing private gardens in the Delaware Valley. Thereafter he worked at Mount Cuba Center in Hockessin, Del., as horticulturist, woods path horticulturist and director of horticulture. For six years, 2013 to 2019, he was director of horticulture and a board member of Delaware Botanic Gardens, where he was instrumental in developing the initial gardens including the meadow designed by Oudolf. In 2019, he became the horticulturist at the historic Laurel Hill and West Laurel Hill cemeteries in He is a frequent speaker on horticultural topics, including lectures for the Horticultural Society of Maryland.

Barbara Katz, a member of the advisory board for Delaware Botanic Gardens, has been working in the landscape industry for more than three decades. While living in the United Kingdom, she studied with garden designer John Brookes, and then joined Blooming Gardens UK as the principal designer. Upon her return to the United States in 1986, she founded London Landscapes LLC, a design and build company in Brookmont, Md., and began designing gardens in Maryland, the District of Columbia and Virginia. She is known for her knowledge of the full range of plants for successful gardens, but perennials are her passion. Her gardens have been featured in magazines such as Southern Living, Better Homes and Gardens, and Country Living. She is a past president of the Landscape Designer Group. Samples from her portfolio may be seen at

(Approved for 1 Credit through APLD)

2:45 p.m.

Jared Barnes

The Butterfly Effect: Micro Plantings for Macro Impact

Small plants can have a big impact. In this presentation, Jared Barnes, assistant professor of horticulture at Stephen F. Austin State University in Nacogdoches, Texas, will show how specific micro plants can have a macro impact in your garden.

Barnes 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 teaching 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 in Swarthmore, Pa. He has travelled around the United States and into 11 countries to gain a national and global perspective of horticulture. Recent awards include the 2019 PPA’s Academic Award and 2016 PPA’s Young Professional of the Year.

(Approved for 1 Credit through APLD)

Many thanks to our 2020 Seminar Sponsors:

With special thanks to our Winter Seminar partner:

The Perennial Plant Association

For questions, please contact us at