Natural areas within Portland contain ecologically healthy habitat that supports wildlife and provides unique opportunities for people to experience nature locally. Invasive plants such as non-native blackberry, ivy, and holly displace native vegetation in our natural areas, degrading scenic and ecological diversity. Once these invaders root and spread, it can take years to clean up the habitat, and many more years to re-establish the native plant community.

Portland Parks and Recreation (PP&R) cares for nearly 8,000 acres of natural areas, and treating for invasive weeds helps native species thrive, supporting wildlife, clean water, and healthy natural areas.

Acres treated have declined in the most recent year due to redeployment to address winter storms, emerald ash borer treatments and the impacts of camping in natural areas.

Data is from chemical treatment of invasive weeds only and tracking is required per OSHA safety standards.

See more detail by viewing the Parks Levy Annual Report or the webpage for Protect the Best, PP&R's invasive vegetation management program for natural areas.