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 and dedicated to the promotion of hardy herbaceous perennials, the Society now has over 2,500 members throughout the Pacific Northwest in Oregon, Southwest Washington, and beyond.

Open Gardens

Open Gardens

Garden Travel

Garden Travel

Plant Sales

Plant Sales

Speaker Programs

Speaker Programs