“Rain Gardens: Low Impact Development Fact Sheet,” Maria Cahill, Derek C. Goodwin, and Jenna H. Tilt. Oregon State University Extension Service. EM 9207 June 2018. https://catalog.extension.oregonstate.edu/em9207/html
“Building a Rain Garden in the Pacific Northwest.” April 2011. This 32-minute video produced by WSU, College of Agriculture, Human and Natural Resource Sciences, provides steps to follow to site, design, construct, and maintain a rain garden. https://www.youtube.com/watch?v=9Kti4HJ45BM
“Porous Pavement: Low Impact Development Fact Sheet,” Maria Cahill, Derek C. Goodwin, and Jenna H. Tilt. Oregon State University Extension Service. EM 9210 June 2018. https://catalog.extension.oregonstate.edu/em9210/html
“Vegetated Roofs: Low Impact Development Fact Sheet,” Maria Cahill, Derek C. Goodwin, and Jenna H. Tilt. Oregon State University Extension Service. EM 9202 May 2018. https://catalog.extension.oregonstate.edu/em9202/html
“What you should know about rain barrels and water conservation if you live in the Portland metro area.” Regional Water Suppliers Consortium. 2021. https://www.regionalh2o.org/water-conservation/outdoor-water-conservation/rain-barrels
“Soil: The Dirty Secrets of a Living Landscape,” Gordon Jones and Scott Goode. Oregon State University Extension Service. EM 9304. December 2020. https://catalog.extension.oregonstate.edu/em9304/html
“Mulching Woody Ornamentals with Organic Materials,” Neil Bell, Dan M. Sullivan, and Tom Cook. Oregon State University Extension Service. EC 1629. March 2009, Reviewed December 2017. https://catalog.extension.oregonstate.edu/ec1629/html
The excellent Oregon Flora Project website provides a comprehensive guide to the vascular plants of Oregon. https://oregonflora.org/
“Water Efficient Plants for the Willamette Valley.” This brochure provides a guide to plants for water-efficient landscaping. https://emswcd.org/wp-content/uploads/2013/10/Water-Efficient-plant-guide-small.pdf
“Weekly Watering Number.” Follow the link to get your weekly watering number sent directly to you during our summer dry season. https://www.regionalh2o.org/water-conservation/outdoor-water-conservation/weekly-watering-number
Learn about WaterSense products and water-efficient landscaping by linking to this EPA website: https://www.epa.gov/watersense/outdoors


In collaboration with and in support of the OSU Extension Service Master Gardener Program, the Washington County Master Gardener Association (WCMGA) provides relevant, research-based education and outreach to the public about horticulture and household pests. This information promotes sustainable practices that minimize risks to human health and the environment. WCMGA sponsors a wide variety of gardening–related demonstrations, lectures, seminars and workshops in various Washington County Oregon locations. Most of our events are free and open to the public. The WCMGA is a 501c3 non-profit supported by hundreds of volunteers, who work to educate the public about sustainable, affordable gardening.