HPSO:  Celebrating 30 years of serving gardeners.

We make the world a better place through horticulture.


The Hardy Plant Society of Oregon is a community of passionate gardeners at all levels. The Society offers an extraordinary array of educational programs and activities year-round. With now over 2400 members, HPSO is one of the largest non-profit gardening organizations on the West Coast.

Plant Sale

Discover cool plants

Plant Sale

Visit amazing private gardens

Plant Sale

Attend educational programs and make new friends

Plant Sale

Plant Sales featuring fantastic local nurseries

Plant Sale

One-of-a-kind garden art sales


Exciting Workshops and Events


Travel on tours to exotic places

Example Frame

Upcoming Events  


April 18-19

Hortlandia: Spring Plant & Art Sale
Open to the public  |  Free Admission
More info  

Floor plan and participating nurseries/artists listing available on the Hortlandia page.     

New!  HPSO Quilt Challenge at Hortlandia:  2015 Quilt Challenge rules and procedures  and  Quilt Challenge entry form  or  More info


May 17
Gen(i)us program: "Old Roses for New Spaces: Selecting roses for the modern garden" with Ben Hanna
Open to the public  |  Admission - $5 
More info |  Register at the door


June 26-28, 2015
Portland Study Weekend: "Planet Garden: Gardening in Our Changing World"
Open to the public  |  Admission - $165 (After May 1, 2015: $185)
More info |
Register now


July 1-19, 2015
HPSO Overseas garden tour: "A Grand Tour of Ireland"
Members only
More info |
Sorry, this tour is full



 A wealth of gardening benefits and connections at your fingertips.
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 Hortlandia !

Mark your calendars now for the best plant and garden art sale in our region.  April 18-19

More info > 


Portland Study Weekend

June 26-28, 2015


More info >


Platycodon grandiflorus

Rose 'The Pilgrim'

Lily 'Electric Red'

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