The Hardy Plant Society of Oregon, commonly known as HPSO, is a non-profit volunteer organization for all gardeners: beginning or experienced, amateur or professional. Founded in 1984 the Society currently has over 2,700 members throughout the Pacific Northwest in Oregon, Southwest Washington, and beyond.

Special notice: We are monitoring the Covid-19 epidemic regarding its impact on HPSO activities. At this time, the HPSO office is closed to meetings and visitors. Our Open Gardens program has restarted, mostly on an appointment-only basis. 

Hortlandia is now open for registration: 2021 Hortlandia registration  This will be an outdoor event this year.  More info.

Follow Hardy Plant Society of Oregon on Facebook and Instagram to join our online community.

Members: Please read your weekly email for links to additional content, and be well and be safe!

Open Gardens

Open Gardens

Garden Travel

Garden Travel

Plant Sales

Plant Sales

Speaker Programs

Speaker Programs
Call for Speakers

HPSO is actively recruiting speakers for future programming. Please visit our Call for Speakers page for more details.


Virtual Garden Tours