Welcome to NPA

The Northwest Perennial Alliance is a community of over 1400 friends, neighbors and experts who share a passion for gardening in the Pacific Northwest. Everyone is welcome.

Membership benefits include:


NPA is now accepting applications for

Scholarships of $1,000 are available for two or four-year accredited college or university students, for study in horticulture, botany, landscape design, environmental horticulture, environmental science or landscape architecture. For more information contact the NPA Scholarship Chair.

Download an application.


Upcoming events   

Sunday, April 23
“Butterflies of Cascadia: Life Histories and Conservation”
with David G. James, PhD
Doors open at noon for book signing and plant sales
Lecture begins at 1 pm
NPA members free/Nonmembers $15
Aaron Education Center at Bellevue Botanical Garden
12001 Main Street, Bellevue  98005

Read more.

Friday & Saturday, May 5 - 6
Open Gardens season begins!

Tour private gardens every weekend, now through mid-September. See your Open Gardens directory for details.

Thursday, May 18
Border Weed & Feed

10 am - noon
NPA Border at Bellevue Botanical Garden
12001 Main Street, Bellevue  98005
Spend two hours working in the Border, then enjoy a potluck lunch.

Saturday, May 27
10 am - 4 pm

"Inviting Vines" 10th Annual Clematis Garden Tour
Friends of the Rogerson Clematis Collection
Lake Oswego, Oregon
Information and online tickets at

For more events, see our calendar.