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.

10 Minute University

Join us this summer as we take our talks "on the road". You can find us at the Oregon City Farmers Market - local libraries including Canby, Milwaukie, Gladstone, & West Linn - and this year at the Clackamas County Fair in August. Click here for the complete schedule. 10 Minute University 2015 Summer Classes.


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 14, 2015

The Mystery of Terroir in Oregon – the Relationship of Geology, Soils, and Climate to Wine Dr. Scott Burns, Professor Emeritus of Geology & Past-Chair of the Dept. of Geology at Portland State University *MG education credit.

Wines differ from each other based on seven different factors: the type of grape; the bedrock geology and resulting soils; the climate; the soil hydrology; the physiography of the site; the wine maker; and the vineyard management techniques.

The first five of these factors make up what the French call terroir, “the taste of the place”. Bedrocks weather into soils which then liberate chemical nutrients to the grape vines. Twelve of the sixteen essential elements for wine grapes come from the soil. All around the world the geology and soils make up an important component of the terroir of the wine.

Using examples from the Willamette Valley of Oregon, terroir of the region will be discussed because it is strongly influenced by the bedrock geology and soils.

Dr. Burns has been teaching for 44 years, with past positions in Switzerland, New Zealand, Washington, Colorado and Louisiana. Scott specializes in environmental and engineering geology, geomorphology, soils, terroir and Quaternary geology.

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