Invasive Plants

Program
Invasive plants can reproduce rapidly and spread quickly, taking space, nutrients, water, and light from other plants. The City is working to control invasive plants that damage infrastructure, streams, parks, and natural areas. Portlanders can help.
Photo shows a mound of vining plants covering everything underneath it with a forest background.

Featured content

Photo shows a collage of different types of plants

Portland’s Required Eradication List for Invasive Plants

Photo shows a wetland filled with green plants with pink-purple flowers.

Invasive Plant: Purple Loosestrife

Photo shows a dense mat of yellow-flowered plants that are an invasive species.

Invasive Plant: Lesser Celandine

Photo shows green plants with white flowers with a forest in the background.

Invasive Plant: Garlic Mustard

Photo shows a hillside with green plants and rock walls

Invasive Plant: Spurge Laurel

Photo shows green plants with spade-like leaves and small bunches of creamy white flowers.

Invasive Plant: Knotweed

Photo shows plant. Stems have three leaves that are green and white variegated.

Invasive Plant: Goutweed

Photo shows a waterway filled with an invasive plant.

Invasive Plant: Water Primrose

Photo shows person wearing gardening gloves. Person is cutting down green vining plant which covers fence. Pieces go into large plastic garbage bag.

What you can do to help stop invasive plants

Invasive plants and the damage they can cause to our environment and economy

Contact

Early Detection and Rapid Response (Invasive Plants)

Environmental Services
mitch.bixby@portlandoregon.gov
phone number503-823-2989

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Protecting Rivers and Streams

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Sewer and Stormwater Improvements

Tree Planting

Tree Planting

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