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You are here: Home / Plants / Species Profiles / Giant Hogweed
Species Profiles

Giant Hogweed

Giant hogweedScientific name: Heracleum mantegazzianum Sommier & Levier (ITIS)

Common names: Giant hogweed, cartwheel-flower

Click image to enlarge


Selected Resources

Native To: Caucasus Mountains and southwest Asia (University of Connecticut 2009)

Date of U.S. Introduction: 1917 (University of Connecticut 2009)

Means of Introduction: Ornamental (University of Connecticut 2009)

Impact: Crowds out native species; produces toxic sap that can cause skin irritation and blindness (University of Connecticut 2009)

Current U.S. Distribution:

Federally Regulated:

  • Noxious Weeds Program
    USDA. APHIS. Plant Protection and Quarantine.
    Includes species listed as a Federal Noxious Weed under the Plant Protection Act, which makes it illegal in the U.S. to import or transport between States without a permit.



Selected Resources:

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Council or Task Force

Priority Species: Giant Hogweed
Washington State Recreation and Conservation Office. Washington Invasive Species Council.

Fact Sheet: Giant Hogweed (Jan 2014; PDF | 804 KB)
Alberta Invasive Species Council (Canada).
See also: Fact Sheets for more information about individual invasive species, including those listed as "Prohibited Noxious" and "Noxious" under the Alberta Weed Control Act


Federal Noxious Weed Disseminules of the U.S. - Fact Sheet:
Heracleum mantegazzianum

USDA. APHIS. PPQ. Center for Plant Health Science and Technology; California Department of Food and Agriculture.

Alaska Exotic Plants Information Clearinghouse (AKEPIC): Species Biography - Giant Hogweed (Feb 7, 2011; PDF | 235 KB)
University of Alaska - Anchorage. Alaska Center for Conservation Science.
See also: Non-Native Plant Species List for additional factsheets (species biographies) and species risk assessment reports of non-native species present in Alaska and also non-native species currently not recorded in Alaska (potential invasives).

Giant Hogweed in Connecticut
University of Connecticut. Connecticut Invasive Plant Working Group.

Invasive Plant Atlas of New England (IPANE) - Giant hogweed, Giant cow parsnip
University of Georgia. Center for Invasive Species and Ecosystem Health.

Invasive Plant Atlas of the United States - Giant Hogweed
University of Georgia. Center for Invasive Species and Ecosystem Health.

New York Invasive Species Information - Giant Hogweed
New York Invasive Species Clearinghouse.

Fact Sheet: Giant Hogweed
Massachusetts Introduced Pests Outreach Project.

Texas Invasives Database - Heracleum mantegazzianum

Invasive Species Compendium - Heracleum mantegazzianum
CAB International.

Delivering Alien Invasive Species Inventories for Europe (DAISIE): Species Factsheet - Heracleum mantegazzianum
European Commission. Sixth Framework Programme.

EPPO Global Database - Heracleum mantegazzianum
European and Mediterranean Plant Protection Organization.

Non-native Species Information: Giant Hogweed
Great Britain Non-Native Species Secretariat.

NOBANIS: Invasive Alien Species Fact Sheet - Heracleum mantegazzianum (2007; PDF | 590 KB)
European Network on Invasive Alien Species.
See also: NOBANIS Fact Sheets for invasive alien species of the European region, covering both animals and plants, as well as microorganisms

Global Invasive Species Database - Heracleum mantegazzianum (herb)
IUCN. Species Survival Commission. Invasive Species Specialist Group.

Invaders Factsheet: Giant Hogweed
Ontario's Invading Species Awareness Program (Canada).

Federal Government

U.S. National Plant Germplasm System - Heracleum mantegazzianum
USDA. ARS. National Genetic Resources Program. GRIN-Global.

Fire Effects Information System (FEIS) - Heracleum mantegazzianum
USDA. FS. Rocky Mountain Research Station. Fire Sciences Laboratory.

Conservation Practice Job Sheet VT-315 - Giant Hogweed (PDF | 125 KB)
USDA. Natural Resources Conservation Service.
See also: Conservation Practice Information for more job sheets

PLANTS Database - Giant Hogweed
USDA. NRCS. National Plant Data Center.

International Government

Weeds in Australia - Giant Hogweed (Heracleum mantegazzianum)
Australian Government. Department of the Environment and Energy.

Giant Hogweed (PDF | 1.20 MB)
Ontario Ministry of Natural Resources (Canada).
See also: Invasive Species Fact Sheets for more resources

State Government

Human Health - Giant Hogweed Overview
Michigan Department of Agriculture and Rural Development.

Fact Sheet: Giant Hogweed (Heracleum mantegazzianum) (2014; PDF | 334 KB)
New Hampshire Department of Agriculture, Markets, and Food. Division of Plant Industry.
See also: New Hampshire's Prohibited Invasive Plant Fact Sheets for additional invasive trees, shrubs, vines, and herbaceous plants

Nuisance & Invasive Species - Giant Hogweed: Do Not Touch This Plant!
New York Department of Environmental Conservation.

Plant Pest Risk Assessment for Giant Hogweed, Heracleum mantegazzianum (2013; PDF | 3.89 MB)
Oregon Department of Agriculture.
See also: Weed Resources for more risk assessments

PA Noxious Weed Alert: Giant Hogweed (PDF | 1.31 MB)
Pennsylvania Department of Agriculture. Plant Industry.
See also: Noxious, Invasive and Poisonous Plant Program Publications for more hogweed resources

Invasive Plants in Pennsylvania: Giant Hogweed (PDF | 180 KB)
Pennsylvania Department of Conservation and Natural Resources.

See also: Invasive Plant Fact Sheets for plant species (trees, shrubs, vines, herbs and aquatic plants) that have impacted the state's natural lands

Class A Noxious Weed: Giant Hogweed
Washington State Noxious Weed Control Board.

King County (Washington) Noxious Weed Control Program - Giant Hogweed
King County Department of Natural Resources (Washington). Water and Land Resources Division.

Giant Hogweed (Heracleum mantegazzianum)
Wisconsin Department of Natural Resources.


Weed Control in Natural Areas in the Western United States: Giant Hogweed (2013; PDF | 218 KB)
University of California. Weed Research and Information Center.
See also: Weeds in Natural Areas for more information sheets

The Infamous Giant Hogweed (Jan 2008)
Purdue University Extension. Weed Science.

New York Sea Grant Fact Sheet - Giant Hogweed (Heracleum mantegazzianum) - Poisonous Invader of the Northeast (Aug 2009; PDF | 888 KB)
New York Sea Grant.
See also: Aquatic Invasive Species: Publications


Integrated Taxonomic Information System. Heracleum mantegazzianum. [Accessed Mar 19, 2015].

University of Connecticut. 2009. Giant hogweed. Invasive Plant Atlas of New England.

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Last Modified: Sep 15, 2018
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