HPSO:  Celebrating 31 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 2450 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  


February 12-14
HPSO winter botanical display at the Portland Yard, Garden, & Patio show

Open to the public  
More info  |  Volunteers needed - Sign up now 


February 27
HPSO After Hours at Cornell Farm

Members only | Free Admission  
More info  |  Register now 


February 28
Gen(i)us Program: "Winter Flowers, Winter Fruit" with Dorothy Rodal

Open to the public | Admission - $5, or subscribe to the whole series of 5 programs for $20  
More info  Register for the Series   


April 9-10
Hortlandia: HPSO's Spring Plant & Art sale
Open to the public   |   Free Admission   |   More info 

Quilt challenge information   |   Quilt challenge online entry form   
Artist vendor online application form

Now accepting registrations for Hortlandia volunteers here.



 A wealth of gardening benefits and connections at your fingertips.
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Hortlandia 2016

April 9th-10th

Save the date!

2nd Annual Quilt Challenge

More info>


Platycodon grandiflorus

Camellia hybrid

Helleborus 'Painted Double'

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