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The City of Portland, Oregon

Environmental Services

working for clean rivers

Phone: 503-823-7740

Fax: 503-823-6995

1120 SW 5th Ave, Suite 613, Portland, OR 97204

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Giant Hogweed

giant hogweedHeracleum mantegazzianum (giant hogweed)

  • ODA “A” rank species (ODA ranking page)
  • Portland 'Required Eradication' species

Giant hogweed is a striking, highly visible species capable of creating significant ecological damage. Native to south-central Russia, hogweed has been known as an invasive throughout Britain and Ireland for decades, and was the target of a sizable eradication effort in Seattle in the 1990s.