Clackamas County Master Gardeners


Master Gardeners™ are trained volunteers, educated through OSU Extension Service to offer the local community Reliable, Relevant and Reachable gardening information and education opportunities.

Reliable: our gardening advice and education is science-based.

Relevant: customized information for your gardening situation.

Reachable: call us on the phone, email us a question, or visit with us at markets or gardens in your community.


Free Lectures

We hold free lectures on the 2nd Monday of each month (except July and August) at the Milwaukie Center (5540 SE Kellogg Creek Drive in Milwaukie). Lectures are open to the public and start at 7 p.m.


Monday, May 8, 2017

Aging and Gardening - A Panel Discussion - Barbara Blossom Ashmun Patty Cassidy, and Carolyn Guinther will offer advice drawn from research and personal experience.

Popular garden writer and speaker Barbara Blossom Ashmun gardens on nearly an acre in Portland’s West Slope. Over the past decade, she has successfully transitioned her spectacular garden toward lower maintenance. Barbara wrote the garden column for the Portland Tribune from 2004 to 2011. She has written 6 garden books, most recently Married to My Garden, about her love affair with plants. Her seventh book, Love Letters to the Garden, is available on Amazon.

Patty Cassidy is a registered horticultural therapist. Her book, The Practical Illustrated Guide to Gardening for Seniors, published in 2012, was chosen by The Oregonian as one of the top five garden books that year. It won the American Horticultural Therapy Association Publication Award in 2013. Patty is President of the Portland Memory Garden and currently works with frail elders and older adults, especially those who have memory impairment. Patty is a life-long gardener, a Master Gardener™, and tends her large residential garden on Mt. Tabor.

Seasoned gardener Carolyn Guinther lives and gardens on nearly one acre in Aloha. Carolyn’s garden began in 1960 but the present one was formed in 1991. In recent years, Carolyn has transitioned her garden by incorporating choice shrubs and low-care perennials to simplify maintenance. Her garden continues to enjoy its reputation as a show place. Carolyn’s garden has opened many times for fundraising events, including twice for the Garden Conservancy Open Day.


2017 International Master Gardener Conference Portland, Oregon, July 10 - 14

Registration link:

Blog page with all the info for the event:

And sign up for the newsletter to stay in the know:


Clackamas County Master Gardeners are the folks who put on the annual Spring Garden Fair, bringing together over 7,000 gardeners with over 150 plant and garden-art vendors.

Oregon State University Extension Service offers educational programs, activities, and materials without discrimination based on age, color, disability, gender identity or expression, marital status, national origin, race, religion, sex, sexual orientation, or veteran's status. Oregon State University Extension Service is an Equal Opportunity Employer. In reference to publications, events, or activities: Publications will be made available in accessible formats upon request. Please call 503-655-8631 for information. If you have a physical disability that requires special considerations in order for you to attend the event/activity, please notify the metro Master Gardener program at 503-655-8631 or