Your next plant experience
PHOTO CREDIT: KIM CAMPBELL
Workshop: Woodland Frame Design
Create a living woodland artwork with Françoise Weeks—hands-on design at Elk Rock.
Workshop: Boost Biodiversity in Your Garden
Bring Your Garden to Life with Insect-Friendly Gardening
Workshop: We Love Lilies
A Survey of Lily Groups and Propagation with Linda Beutler
PlantFest 2026
Fall is a GREAT time to plant. This event helps you buy plants for the season and also features an engaging knowledgable speaker.
HPSO Members-Only Open Gardens
Join HPSO today to be a part of the experience. Season typically runs from April to October.
HPSO Members-Only After Hours
Join HPSO today for member-exclusive events at our region's independent nurseries. Season typically runs March through November.
Past events
PHOTO CREDIT: KIM CAMPBELL
HPSO Speaker Program with Stephanie Mahon, “The New Beautiful: The changing face of gardens”
Join Gardens Illustrated editor Stephanie Mahon for an inspiring look at how climate and sustainability are reshaping garden design.
Greener Gardens in a Drier World – HPSO Members Only ZOOM
Which plants thrive with less water in Western Oregon? OSU researchers share drought-tolerant ornamentals and tips for resilient home landscapes.
Hortlandia 2026, Saturday
Plants, plants, plants — and garden art. Public admission day with plenty to discover and take home.
Hortlandia 2026, Friday
Early access, first pick. Join us Friday evening for public shopping that helps support HPSO programs and events.
HPSO Winter Program with Rebecca Sweet, via Zoom
The Power of Shrubs: The Secret to Cohesive Garden Design
Plant Nerd Night, no, Afternoon
A little mayhem, a LOT of expertise. Come learn what plants our local nursery owners are excited about this year.
HPSO 2025 Annual Meeting
Members-only: join us for a talk, refreshments, prizes & annual election