Delaware Valley Chapter of the North American Rock Garden Society
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Rooted in Diversity:

NARGS Study Weekend and Pre-conference Tour, May 2-5, 2019

The Delaware Valley Chapter is pleased to host the 2019 Spring Study Weekend, May 3-5. The conference features an excellent line-up of speakers, tours, open gardens, sales, and more. There is also a separate pre-conference tour, May 2-3. Our meeting location is Frazer, Pennsylvania, about 25 miles west of Philadelphia.

Program Synopsis

Our official events begin on Friday with plant show, plant sale, book sale, dinner, and lectures. On Saturday there is breakfast and a bus trip to gardens. Later in the day we have the plant show, plant sale, happy hour, dinner, and lectures. Then on Sunday we have breakfast buffet, then the final lectures. There will also be gardens open on Friday and on Sunday afternoon.



We are celebrating our roots in horticulture with an inquisitive look at ecosystems near and far. Local experts will show us the exciting plants that grow in the understory of our eastern temperate woodlands, in the unique pine barrens, and in marginal areas and salt marshes. Global experts will introduce rare plant communities as we circumnavigate the globe.

Speakers and Talks

Garden Tours

Our Saturday bus trip has us all visiting two private gardens and one public garden:

  • Rad MacFarlane's garden, in Wilmington, DE, is known for its diverse rock garden, woodland plantings, and excellent large troughs, mostly made by Rad.
  • Wayne Guymon's garden, in Chadds Ford, PA, has a huge pond with an island, a hillside planted with thousands of hostas in colored ribbons, and countless azaleas and sun-loving perennials. It has been featured in Martha Stewart's Living.
  • Mt. Cuba Center is a lovely botanical garden focused on native plants of eastern US. It is also notable for its research program dedicated to identifying the best native plant varieties for the garden. At Mt. Cuba we eat our box lunches and enjoy a guided tour.

Open Gardens

Several private gardens will be open for visiting on your own on Friday (morning and early afternoon). Another set of private gardens will be open on Sunday after the meeting closes.

Plant Sale

The plant sale features these exciting vendors:

  • Meadowbrook Farm
  • Gettysburg Gardens
  • Bridget Wosczyna (arisaemas)
  • Edgewood Gardens
  • Rooster Ridge Pitcher Plants
  • Delaware Valley Chapter NARGS

Other Conference Events

Additional activities include raffles, book sale, and plant show.

Pre-Conference Tour

The pre-conference tour goes to the New Jersey Pine Barrens, Shenk's Ferry, a serpentine barrens, and other outstanding botanical sites. It will be held on May 2-3.

Pre-conference Tour page

While you're in the area...

We are located in a hub of horticultural activity, with multiple world-class public gardens. While you are in the area, be sure to schedule time to visit some of them: Longwood Gardens, Winterthur, Chanticleer Garden, Morris Arboretum, the Scott Arboretum, Bowman's Hill Wildflower Preserve, and Bartram's Garden. Find detailed information and links for these and other sites at


The conference hotel is the Sheraton Great Valley. See our Hotel Page for details.


The conference registration fee is $425 and includes all programs and meals from Friday night, May 3, to Sunday morning, May 5. The pre-conference tour fee is $190, which includes transportation, guides, and lunches. The registration deadline is March 1, 2019.

Registration Information