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  


February 27, 28, March 1
Yard, Garden, & Patio Show (see HPSO's botanical display)
Open to the public
More info


March 8
Gen(i)us Program: "Rhododendron Species and Their Journey to Your Garden" with Mike Stewart
Open to the public  |  Admission - $5
More info
 |  Advance registration not required; pay at the door


March 28
Special seminar: "Drawing Nature into Urban Landscape Design"
Open to the public  |  Admission - $99 for HPSO or PacHort members; $125 for public
[Please note: Price goes up after March 10th to $125 for HPSO members and $155 for the general public.]
More info
 |  Register thru PacHort here


April 2
Special garden tour: Elisabeth Miller and Dunn Gardens tour
Members only  |  Admission - $75 (includes lunch); limited to 17 participants
More info
 |  Sorry, this tour is now filled.


April 18-19

Hortlandia: Spring Plant & Art Sale
Open to the public  |  Free Admission
More info   Register now to be a volunteer.     
Registration is also open for garden artists, and for community partners

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

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



 A wealth of gardening benefits and connections at your fingertips.
learn more >


Member Login

Membership expired?
Renew >



 Open Gardens Book

Entries are now being accepted for the 2015 edition.   Deadline is February 22nd.

Submit your entry now


Portland Study Weekend

June 26-28, 2015


More info >


Platycodon grandiflorus

Rose 'The Pilgrim'

Lily 'Electric Red'

powered by MemberClicks