About NPA

The Northwest Perennial Alliance (NPA) was founded by a small group of plant enthusiasts in Seattle in 1984. It was patterned after the Hardy Plant Society of Great Britain, offering free garden tours, lectures, plant sales and a seed exchange.

Today NPA is one of the largest nonprofit gardening organizations in Washington, with members from Snohomish to Olympia and beyond. With its popular Open Gardens program and network of neighborhood garden groups, NPA is the best way to meet other gardeners, and learn more about perennials and hardy plants that will survive and thrive in our climate.

NPA is also a partner at Bellevue Botanical Garden, where we maintain the famous NPA Border. This beautiful perennial garden is our gift to the community, and offers hands-on learning opportunities for NPA members through classes, workshops and volunteer crews.

Our Mission

The NPA is an organization of ardent gardeners with a passionate devotion to herbaceous plants.  Members comprise a wide range, professional to amateur, but all with the aim of furthering gardening in the Northwest.

We are organized primarily for educational purposes, which include:

  • The advancement of horticultural education and knowledge of gardeners through lectures, garden tours, the Northwest Perennial Alliance Border at the Bellevue Botanical Garden, literature, and other educational programs.
  • The advancement of the culture, study and availability of ornamental, hardy herbaceous plants.
  • The conservation of rare, old and lesser-known ornamental, hardy herbaceous plants.