Northwest Perennial Alliance
2018 Hardy Plant Study Weekend

"Gardening:  A Lifetime of Pleasure"
June 22-25 Cascadia College, Bothell

Sorry, we are SOLD OUT.

What is your first memory of gardening?  Perhaps it was when you were a five-year-old helping sow seeds in the vegetable garden. Or maybe you were lucky to have a grandmother who shared her love of gardening with you and showed you the magic and wonder found in every leaf, flower bud and visiting bumblebee. Whenever, however, your love of gardening arose, it is a passion that is shared by many. The 2018 Hardy Plant Study Weekend conference is about reveling in all aspects of gardening, from plants to people: it all adds up to “A Lifetime of Pleasure.”

Every four years, NPA hosts the Hardy Plant Study Weekend conference. The event rotates with our friends in the Hardy Plant Society of Oregon in Portland and the Hardy Plant Groups of Vancouver and Victoria in British Columbia. The weekend is full of top-notch speakers, stunning and inspiring gardens, plant sales from specialty nurseries and a fantastic, fun-filled evening at the Saturday night dinner party. 



This year's speakers include June Blake, Dan Hinkley, Claudia West, Janice Currie, Jimi Blake and emcee Nancy Kartes. Lectures and plant sales will be held at Cascadia College in Bothell. Both of these activities will be held on Friday evening, Saturday morning and Sunday morning. Read more about our speakers.


For your shopping pleasure, several specialty nurseries will be at the lecture venue. For our Canadian friends, we expect to have phyto inspection available. 


Don’t miss out on the fun at the Saturday Soiree at McMenamins Anderson School. We encourage you to dress in your best garden attire. Of course, that is open to interpretation!  A full course buffet dinner will be served and a cash bar will be available. Ciscoe Morris will be the emcee for the after-dinner events, including handing out prizes associated with best garden attire categories.


Gardens open for HPSW attendees will be localized in areas to maximize garden visitations and minimize travel time between destinations. Gardens will be clustered on Friday in Puyallup and Woodinville for all day touring. Saturday gardens are open in the afternoon in the Edmonds area. Sunday gardens are open in the afternoon and localized in Seattle.

Don't miss Monday! Friday's gardens will be open again Monday, giving you a chance to see the ones you missed. Other Monday events will be announced soon.


Sorry, we are SOLD OUT.

Study Weekend registration includes lectures, coffee breaks, garden tours and access to plant sales. Registration is per person and does not allow non-registered guest or spouse access to gardens.  Saturday Soiree registration is also per person. 

This event is limited to 400 participants.

Registration on or before May 1, 2018………………..$175

Registration after May 1, 2018 ………………………....$200

“Celebrating Life in the Garden”
Saturday Soiree buffet dinner
at McMenamins Anderson School…………………...….$75

Registration confirmation will be sent by email.

Cancellation policy is a $20 fee for each registration cancellation.  Cancellations prior to May 22 will receive a refund of the balance after fee.  After May 22, your registration cancellation will be considered a donation to the NPA. 


For your convenience, you can order Panera box lunches for $16 online when you register.


NPA has negotiated discount rates at a few hotels in the vicinity. Hotel accommodations are limited in the immediate vicinity of the conference, so we encourage you to quickly secure your lodging.

Country Inn and Suites
19333 North Creek Parkway
Bothell, WA 9801
Or call: 800 456-4000 and specify Bothell, WA
Select arrival/departure dates, then click on button that says “more search options.” Leave the “rate type” blank and type in “NWPA” where is says coed or ID.
Click on “more search options” and type in code: NWPA.Then go back and click on the search button and it takes you directly to the correct room allotments
Rooms allotted: 15 at $189/nt. /2 queen beds

Residence Inn Seattle
11920 NE 19th St
Bothell, WA 98011

Rooms allotted: 20 at $224/nt./studio suites

Hilton Garden Inn
22600 Bothell Everett Highway
Bothell, WA 98021 
Or call: 425 381-8028
Request the Northwest Perennial Alliance rate
Rooms allotted: 30 at $154/nt./2 queen beds

Holiday Inn Express
22922 15th Ave SE
Bothell, WA 98021
Or call: 1 888-465-4329
Request group code NPA
Can request king room with pull out sofa
Rooms allotted: 22 at $189.99/nt./king bed

Courtyard by Marriott Kirkland
11215 NE 24th St
Kirkland, WA 98034
Or call: 425 602-3200
Rates range from $195/nt. - $264/nt.
Lowest rate is non-refundable.
Be sure to check cancellation policy.
No allotment or special rate.

McMenamins - Anderson School
18607 Bothell Way NE
Bothell, WA 98011
Or call: 425 602-3200
Rates range from $205/nt. - $255nt.
No allotment or special rate.