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.

September 11:

Of Moss and Men - Sarah Jovan, USDA Forest Service

U.S. Forest Service scientists in Portland began a novel study in 2013 by using moss collected from urban trees to develop fine-scale maps of air pollution. Urban moss analysis potentially could revolutionize air quality monitoring by serving as an inexpensive screening tool to help cities quickly identify where to place pollution monitoring equipment. Earlier findings from this study contributed to new pollution controls, reexamination of the regulatory exemptions for the stained-glass industry, and the creation of a new state program, “Cleaner Air Oregon.”

Sarah Jovan is a research lichenologist and the lichen communities indicator advisor for the USDA Forest Service Forest Inventory and Analysis Program, and is part of the Resource Monitoring and Assessment Program within the Pacific Northwest Research Station in Portland.

*MG education credit*


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