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The City of Portland, Oregon

Development Services

From Concept to Construction

Phone: 503-823-7300


1900 SW 4th Ave, Portland, OR 97201

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Your Role in Invasive Plant Control and Helping to Keep Our Rivers and Streams Clean

Avoid Invasive Species

Butterfly Bush

If you don't know it, don't grow it. Avoid buying or growing plants such as purple loosestrife, English ivy, ribbongrass, and butterfly bush that are known to be invasive.

Be especially careful when buying plants and seeds on the internet or by mail order. You may unknowingly contribute to the spread of an invasive species from one part of the country to another. Although some companies have voluntarily withdrawn known invasives from sale or labeled these species high risk, many have not.

Check out these Tips For Stopping the Spread of Invasive Plants. More information can be found on the Bureau of Environmental Services webpages on Invasive Species Management

What You Can do for Clean Rivers and Streams 

Many of our common, everyday activities can affect the health of our urban watersheds. When it rains, stormwater runoff that isn’t properly managed can wash over streets and other hard surfaces and carry pollutants into our rivers, streams and groundwater. We can all work together to keep our watersheds healthy and our rivers and streams clean. 

Follow this link for a list of activities that contribute to clean rivers and streams. You can also find more information about Portland’s Watershed Services on the BES website.