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Washington State University

MG Demonstration Gardens

(425) 338-2400

Jennings Park Demonstration GardenAred and orange rose in full bloom, from the Jennings Park MG Demonstration Garden.

Described by Horticulture Expert Ed Hume as one of the finest Master Gardener Demonstration Gardens that he had ever visited, the Jennings Park Demonstration Garden is easily accessible all year around to the public just a mile from Interstate 5 in Marysville.

The one-acre garden consists of an integrated mix of perennial, annual, and edible beds featuring a variety of gardening practices and ideas, most of which can easily be incorporated into your own landscaping. Or the garden can simply be enjoyed within the tranquility of the park.

Visit the English, Rose and Cutting Gardens; come see what’s new in the Vegetable Gardens; let the little ones play Hopscotch in the Walkable Garden; explore the vertical garden area; and look at all the beds with Dwarf Conifers, Heucheras, Hostas, Grasses, and much more,


While the garden itself is open year-round, volunteers are available to answer questions, explain techniques, and help solve home garden problems every week May through September on Mondays and many Wednesdays 9 am to noon (excluding holidays). Call 425-357-6010 for an exact schedule.


Use the main entrance to Jennings Park at 6915 Armar Road in Marysville. The demonstration garden is southeast of the parking area just beyond the Children’s play area.


Take exit 199 from I-5; drive east 3/4 of a mile on 4th Street; turn left on 47th. Continue 1/2 mile, bearing right at the Y; look for the park entrance on the right.

Map to Jennings Park (website)


Jennings is open year-round for self-guided tours. To arrange a group tour call the WSU Extension Office at (425) 338-2400.

Take a Virtual Tour (pdf) (Please allow time to download; 4mb file)

Evergreen Arboretum Demonstration Garden BorderA raised garden bed with a cement retaining wall borders a cement path with purple,red, green, yellow and orange plants.

Originally designed and built by Master Gardeners in 1992, this demonstration garden border was part of the north Everett arsenic mitigation project, which removed the contaminated topsoil and all plants in the Evergreen Arboretum at Legion Memorial Park. Once the project was complete in the fall of 2016 and new irrigation installed, the 200-foot border was redesigned and planted by Master Gardeners and is in the process of returning to its original splendor. It is known as one of the jewels of the Evergreen Arboretum and well known around Puget Sound for both its educational value to the residential gardener and its beauty as a display garden. The project is a collaboration between the Washington State University – Snohomish County Master Gardener Program, the Evergreen Arboretum & Gardens Foundation, and the Everett Parks and Recreation Department. For more information and a photo tour, please visit the Arboretum website.


American Legion Memorial Park, 145 Alverson Blvd Everett, WA


  • Take Exit #195 (Marine View Dr) on I-5
  • Go Left on E. Marine View Dr
  • Follow around under Hwy #529, until road becomes W. Marine View Drive
  • Past the Golf Course entrance, Take Left onto Alverson Blvd.
  • Take first left into the park then turn right at T-intersection.
  • Arboretum entrance is at the blue columns at the end.

Map to Legion Demo Garden (website)

McCollum Park Demonstration Garden

Snohomish County WSU Extension Education Center and Demonstration Gardens show in front of and surround a beige metal building and a brown wooden arbor, with a grey rock path

McCollum Park was the first garden in the Snohomish County Park system. Volunteers created it in the 1960’s along with the Parks Department on what was once a landfill site. In 1984 WSU Snohomish County Extension moved into the administrative buildings. Since then, WSU-Snohomish County Extension Master Gardeners have created a series of demonstration and teaching gardens surrounding the office buildings.

Though the buildings themselves closed in 2020, the demonstration garden is still open, and continues to educate and delight the public. These ever-changing gardens are funded by the Snohomish County Master Gardener Foundation and designed, planted and maintained by Snohomish County Master Gardeners. They demonstrate a variety of planting styles, themes, and techniques in the hope that visitors will learn something new, discover something wonderful, and most of all, truly enjoy their time visiting the McCollum Park Demonstration Garden.


600 128th St. S.E. Everett, WA 98208


  • Take I-5 to Exit #186 (128th St)
  • Go East on 128th St about ½ mile
  • Turn into McCollum Park located on right side of street
  • Proceed South in the park past the pool and ball fields.

Map to McCollum Park. The Demo Garden is at the curve in the “park road.”