HPSO Study and Interest Groups

For some Hardy Plant Society members, the lectures, annual meeting, plant sales and other activities of general membership are not enough; they want to get together with other local gardeners more frequently and in a more intimate way. To meet this need, members of HPSO have formed some smaller study or interest groups.

Interest Groups come in two basic types: groups based on geographic proximity and groups based on the study of a specific topic or area of gardening.  The groups based on geographic proximity tour gardens, have lectures of interest to the members, visit local nurseries and other members gardens. Although geographically based, these groups are not limited to membership only from gardeners in their areas.

For more information about these groups or for help getting your own group started, please contact us.

If you are already a member of HPSO and would like the contact information for the group chair, please see our Members-Only Study & Interest Group page for details.

Regional Groups

Clark County

HPSO Clark County Study Group

Since 1994, the HPSO-Clark County Interest Group has been sharing gardens, ideas, plants, and friendships. Most or our 80+ members live in Clark County, WA plus a few from Cowlitz County. Our meetings are held on the second Wednesday of each month, March through October and we are open to new members. Meetings are normally held at a member’s garden and include a garden tour, potluck dinner, short business meeting, and a presentation about various gardening topics by a guest speaker. Our focus is on education whether it be a formal presentation, timely articles in our monthly newsletter, or simply from gardener to fellow gardener. We also plan occasional field trips to area nurseries and encourage our members’ participation in HPSO events. Connecting gardeners who often form lifelong friendships is perhaps the best perk of membership in HPSO-CC.

Columbia Gorge

Gorge Gardeners is looking for gardeners interested in meeting other local gardeners.

Monthly get-togethers will be held March – October, and will include:

  • Talks by local and visiting experts
  • Trips to nurseries, plant sales, and specialty plant breeders
  • Garden visits
  • Plant and seed swaps
  • HPSO lectures and events

Join us for tips on gardening in the Gorge, ideas on plant selection, book, blog, and magazine suggestions, and much, much more.


HPSO Eastside Study Group

This group meets in members homes throughout the year. Meetings are held on the first Thursday of each month in the morning. The monthly meetings include workshops (hypertufa trough building for example) nursery visits, tours to private and public gardens, as well as potluck picnics and plant exchanges.   The HPSO members in this group largely live on the Eastside of Portland, but all HPSO members are welcome.


This group meets in members homes throughout the year. Meetings are held on the second Wednesday of the month in the evening.

Oregon City

This group meets in member’s homes throughout the year. Meetings are held on the third Thursday of the month in the afternoon. In addition, there are two yearly plant exchanges, nursery trips and a holiday pot luck.

Two Rivers

HPSO Two Rivers Study Group

The Two Rivers Group was founded in 2006, by Hazel Childs.

Our focus is education and social togetherness. We are a diverse but very simpatico group of women, having a wide range of garden styles and horticultural interests. We love to share, listen and learn from each other.

The group enjoys planned visits to local public and private gardens, including member gardens. We also love to visit nurseries and other horticulture businesses and sometimes we host speakers. We ALWAYS include lunch!

All of our members live in the areas near the Willamette and Tualatin Rivers including Lake Oswego, West Linn, Oregon City, Tualatin, Wilsonville and Woodburn. We stay in touch by group emails and we meet on the second Thursday of the month.

We are approximately 32 members strong, which is the maximum size that makes this group work. For practical and logistical reasons, we are currently not adding members. 


HPSO Webside Study GroupThe Westside Study group furthers garden related learning by offering visits to area nurseries and gardens (public and private) as a small group. The smaller group helps foster personal friendships with other members who share a passion for plants and gardens. It also provides a great, informal forum to exchange ideas, problem solve and generally share our latest successes or challenges. Our group is a good choice for anyone who wants to expand their involvement beyond the main HPSO sponsored activities.

We meet on the third Thursday of the month in the mornings. In the winter we might have a speaker, slide show or other indoor activity. The spring and summer months have garden and nursery visits. We have a summer soiree with spouses, an autumn plant exchange and we have in the past done some summer overnight trips and a holiday luncheon. Occasionally we will have an all-day activity. Our dues are $10/year. Membership in HPSO is required.

Most of our members come from the Westside of Portland, but we welcome anyone who is an HPSO member to join us. Our activities are mostly in and around the greater Portland metro area, but are not limited to that area.

Other Interests

Bloomin' Purls

This group melds gardeners and needlework enthusiasts. The group meets both in member’s homes and at various needlework-related stores around the area. Meetings are held the second Tuesday of the month in the late morning.

Gardening in Our Golden Years

Members in this group are active gardeners 60 years old on up. They provide a supportive network to edit and simplify their gardens, visit nurseries, gardens and take field trips. They meet on the third Tuesday of each month in members homes in the early afternoon, or sometimes earlier for field trips.

HPSO Walkers

Hi there HPSO Walkers!  The HPSO Walkers walk every fourth Thursday of the month.  We go three or four miles each time.  We go around the Portland Metro area and sample local parks and neighborhoods. The monthly notification gives location to meet and conditions we expect to encounter.  At the first walk you will see if there is anyone you can carpool with in the future.

We try to leave very promptly at 9:30am.

Any member of HPSO is welcome to join us once or as often as they like.

Well-behaved dogs on a leash are welcome on the walk.

We always have great conversation about our gardens as well as the flora we encounter!

This is a social group rather than a get in your target heart range group.  We usually go for coffee after the walk.

HPSO Horticultural Book Group

Members share a love of reading and gardening. Books are selected with both in mind.

Travel Club

This group meets 3-4 times a year at the HPSO office for travel slideshows and socializing. Meetings are usually Sunday afternoons during Fall/Winter/Spring and a Thursday afternoon if we have a summer meeting. There are no dues, however we do accept donations to cover program expenses. HPSO Travel Club members receive early notices and early registration for upcoming HPSO overseas tours.


For more information about these groups or for help getting your own group started, please contact us.

If you are already a member of HPSO and would like the contact information for the group chair, please see our Members-Only Study & Interest Group page for details.


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