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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)

Impacts: 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

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.

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.

Data Sheets on Invasive Plants - Heracleum mantegazzianum (PDF | 58 KB)
European and Mediterranean Plant Protection Organization.

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

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

NOBANIS: Invasive Alien Species Fact Sheet - Heracleum mantegazzianum (2007; PDF | 590 KB)
European Network on Invasive Alien Species.

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

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.

Giant Hogweed - Conservation Practice Job Sheet VT-315 (PDF | 125 KB)
USDA. Natural Resources Conservation Service.

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 Alien Project
Giant Alien (Europe).
Giant Alien Project (2002-2005) has been financed by the European Commission within the 5th Framework Programme, Energy, Environment and Sustainable Development.

Giant Hogweed (PDF | 1.20 MB)
Ontario Ministry of Natural Resources (Canada).

State Government

Giant Hogweed (PDF | 334 KB)
New Hampshire Department of Agriculture, Markets, and Food. Division of Plant Industry.

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.

Giant Hogweed (PDF | 1.31 MB)
Pennsylvania Department of Agriculture. Plant Industry.

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

See also: Invasive Plants fact sheets (scroll to view) 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.

Best Management Practices: Giant Hogweed (PDF | 490 KB)
King County (Washington). Noxious Weed Control Program.

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.

The Infamous Giant Hogweed (Oct 2004; PDF | 450 KB)
Purdue University Extension. Weed Science.

Giant Hogweed - MSU Extension Bulletin E-2935 (Jun 2012; PDF | 3.03 MB)
Michigan State University. Extension.

Giant Hogweed (Heracleum mantegazzianum) - Poisonous Invader of the Northeast (Aug 2009; PDF | 888 KB)
SUNY College at Brockport. New York Sea Grant.


BioBullies - Giant Hogweed
Natural Biodiversity (Western Pennsylvania).
See also: Invasive Species Fact Sheets for the worst trouble-makers in the region, and also for additional trouble-makers for you to watch out for.

Giant Hogweed
Ontario Federation of Anglers and Hunters (Canada).


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 17, 2016
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