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Northwest  Perennial  Alliance

Sharing a Passion for Gardening... for 40 years!
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About Us

The Northwest Perennial Alliance, or NPA, is a non-profit volunteer organization for everyone who is passionate about gardening in the Pacific Northwest. We are devoted to teaching, inspiring, and sharing the joy of gardening.

With our popular Open Gardens program and network of neighborhood garden groups, NPA is a wonderful way to meet other gardeners and learn about plants that survive and thrive in our climate.

  • Founded in 1984
  • Over 2,000 members
  • Members from Bellingham to Olympia and beyond
  • Bellevue Botanical Garden 'Garden Partner' since 1992
  • The NPA is a tax-exempt, 501(c)3, non-profit educational organization, incorporated under the laws of the State of Washington

Why Join NPA?

  • Fun and friendships with fellow gardeners!
  • Free inspirational garden tours
  • Fantastic neighborhood garden groups
  • Free lectures that educate and inspire
  • Discounted gardening classes and workshops
  • Lessons from the NPA Perennial Border
  • Specialty plant sales
  • Free twice-monthly emailed educational newletters
  • Free Perennial Post magazine
  • 10% Discounts at many local gardening businesses


Donations support NPA's education programs.

  • Lectures, Classes, and Workshops
  • The NPA Border at Bellevue Botanical Garden
  • Student Scholarships and Internships 

NPA also accepts donations of healthy plants for the NPA Border.

See DONATE for more information.

Leadership Team

The NPA Leadership Team manages all Programs and Activities:

  • Board of Directors
  • Project Chairs
  • Program Committees

See LEADERSHIP TEAM for more information.


The NPA is managed by volunteers who benefit from the shared experience of working with fellow plant lovers. Volunteering is the best way to learn more about gardening and make new gardening friends!

See VOLUNTEERS for more information.

Our Mission:

The Northwest Perennial Alliance inspires, educates, and connects gardeners of all skill levels, sharing the art, science, and joy of gardening in the Pacific Northwest.

Our Values:

Collaboration:  NPA embraces teamwork, respect, sharing, and having fun in all volunteer and membership activities.

Inclusivity:  NPA welcomes everyone with an interest in gardening, and encourages and supports inclusivity in membership and volunteerism.

Sustainability:  NPA is committed to environmentally responsible horticultural practices as reflected in our educational programs and volunteer activities.

What is a perennial?

The Northwest Perennial Alliance is often asked this question! Our organization was formed in 1984 by a group of passionate gardeners who wanted to promote the use of perennial plants to add to their mixed plantings of trees, shrubs, and annuals. They helped bring perennial plants to the attention of NW gardeners and growers, resulting in the expanded plant selection found today! 

The term ‘perennial’ describes plants that live more than two years, excluding trees, shrubs and bulbs. There are three commonly referred to types of perennial plants:

  • Herbaceous Perennials grow from their root stock in the spring, then die back to the ground in winter (Hosta)
  • Evergreen, or Non-herbaceous Perennials, do not die back in winter (Bergenia)
  • Sub-shrubs retain a woody structure in winter and regrow from that structure in spring (Hardy Fuchsia)

Perennial plants are popular with many gardeners due to their hardy nature, natural beauty, and reliable performance.

Contact NPA:   425-647-6004

Mailing Address:   PO Box 1034  Bellevue, WA  98009-1034

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