Land Plants - invasive

Giant Hogweed (Heracleum mantegazzianum) on Jul 14, 2008

Submitter has sample

Description of specimen

Ive done research.I know this plant .Very tall with large white flowerhead which produces many seeds(almost like sunflower seeds,only and larger and paler).Exact plant in your photo gallery.

Commentary

how do I eradicate this plant from my yard?

Reporter
July 14, 2008, 2:44 p.m.

Giant hogweed is both a federally listed and state listed noxious weed. The Oregon Department of Agriculture (ODA) has an eradication program in place to work with land owners and bring this plant under control. Currently most of the known giant hogweed sites in Oregon are in the Portland Metro Area.

Please contact Beth Meyers, ODA Weed Tech. who is coordinating our hogweed efforts. Beth will be able to assist you in controlling the plants. You can contact Beth at 503 986-4621.

Thank you for your report! Tim Butler, ODA Noxious Weed Control Program.

Tim Butler
July 15, 2008, 1:18 p.m.

Resources

There are many plants that look similar to giant hogweed, including our native cow parsnip. Giant hogweed is truly giant, often 7' to 14' tall, with leaves that can be up to 5' wide. There are some great photos comparing giant hogweed to similar species on the New York Dept of Environmental Conservation website.

Location

Neighbors yard and now growing in my yard

Expert Reviewer

Mr. Tim Butler

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