HPSO Committees

HPSO Committees are what makes everything happen in our organization.  They conceive of and put together events, promotional materials, publications, and beyond.  All committees are made up of HPSO members, and are volunteer based.  If you're interested in participating in a committee, please contact us to learn more.

After Hours

The Hardy Plant Society of Oregon wants you to socialize with fellow gardeners and meet owners of horticultural and garden businesses at the group's new HPSO After Hours events. Learn more...


This committee purchases, inventories, and sells books to members related to gardening at various HPSO programs and events. Arranges transportation of books to and from events. Committee members staff the book sales tables at HPSO events. Committee meets once a year, plus mini-meetings every time books are sold at programs.

Botanical Displays

Committee members solicit botanical cuttings from the membership, arrange transport of vases, provide identification cards, and generally coordinate all other aspects of managing the displays at HPSO programs and events.


Fundraising options, etc.

Elaine Joines Memorial Grants

HPSO awards funds to non-profit organizations throughout Oregon and Clark County, Washington, for projects that further these goals. The HPSO Grants Program is named in honor of the late Elaine Joines, who was designer and curator of the Martha Springer Botanic Garden at Willamette University and a dedicated member of the HPSO Grants Committee.  Learn more...


In April of every year, HPSO sponsors an event that is probably the largest of its kind in the Pacific Northwest.   Vendors from far and wide – from nearly the Canadian border to the California border – come to Portland to offer the latest plant introductions as well as the time-tested (and hardiness-tested!) plants.   Complementing the plant vendors are specialty garden art vendors bringing one-of-a-kind pieces made from metal, wood, glass, ceramic, fabric, and stone.   Each work of art is handcrafted by the vendor.  This is a wonderful event, and it's particularly nice to have so many nurseries and artists, with so many plant choices and specialty works, all under one roof! Learn more...

Interest & Study Groups

The HPSO interest groups encompass our regional areas such as Clark County, Gresham, Oregon City, Eastside, Westside, Two Rivers, as well as specific activities such as Bloomin' Purls, HPSO Walkers, Gardening in Our Golden Years, Travel Club, Seedy Characters, and Crafters. Learn more...

Lending Library

Our library has excellent sections on garden history, botany, edibles, trees, shrubs, more than sixty popular genera, garden design, and international gardens.  We include publications by many contemporary notable plantsmen and women, designers, historians and collectors as well as garden artists, writers and experts in specific genera.  We also have a number of older volumes of classic materials for research and reference. If your interest is in literary writing, we have acquired many wonderful volumes by inspired gardeners who have written across hundreds of years, and also include some of our best contemporary writers. Learn more...

Open Gardens

The Open Gardens program offers Hardy Plant members the opportunity to visit and learn from the gardens of others. Each year, any member who wishes to volunteer may host one or more open gardens. The times and dates are listed in the Open Gardens Book, published each March. Open garden dates generally run weekends from April through October. During June, July, August and September, gardens are also opened the 2nd and 4th Mondays of each month. Hosts may hold their gardens open for as many or as few dates as they wish. Learn more...


The Hardy Plant Society of Oregon offers a speaker program and plant sale at an established Saturday, each year, in September. Learn more...

Speaker Programs

The Speaker Programs Committee is responsible for organizing speakers, be they online or in-person. If you would like to suggest a speaker or topic, please get in touch. To learn more about HPSO’s Speaker Programs click here

Study Weekend

HPSO’s Study Weekend features speakers of note in the horticultural world, open gardens, plant and book sales, evening soiree, and an opportunity for attendees from the West Coast and across the country to come together for a weekend of events focused on gardening. Learn more...

Travel Policies

The committee maintains a Travel Calendar to ensure no conflict in tour dates.  Policies and guidelines are maintained to ensure a consistent approach and implementation of tours. Training is provided to potential new tour escorts and planners.