Northwoods Cooperative Weed Management Area
Northwoods Cooperative Weed Management Area

Working Together to Protect

Northern Wisconsin from Invasive Species

The Northwoods Cooperative Weed Management Area (NCWMA) is a collective group of state and federal agencies, municipalities, tribes, nonprofits, community organizations, and individuals who have come together to combat invasive species in Douglas, Bayfield, Ashland, and Iron counties in northern Wisconsin.  Anyone can participate


The Northwoods Cooperative Weed Management Area provides a forum to share information and resources, collaborate on planning, and cooperate on invasive species management in northern Wisconsin.  Learn more about us and check out our upcoming events!

Invasive Plants in the NCWMA

Below are a few high priority invasive species of the NCWMA.  Click this link for information on these and other high priority invasive species in our region.

Garlic Mustard

Garlic Mustard spreads quickly through rich hardwood forests.  The NCWMA works to track and treat infestations.  Volunteers can help hand-pull garlic mustard in the spring!


Giant, Japanese, and Bohemian Knotweeds were planted in yards throughout the region.  The NCWMA works with landowners to eradicate these difficult species.

Wild Parsnip

Watch out for wild parsnip!  This invasive species can cause severe blisters when sap on skin is exposed to light.

Report Invasive Species!

Use this link to report an invasive species.

Get Updates!

Subscribe to the Northwoods CWMA Mailing List!

Contact Us!

If you have questions about invasive species in your area, e-mail or call the NCWMA Coordinator.

Like the NCWMA on Facebook!


Range of the Northwoods Cooperative Weed Management Area

The Northwoods CWMA includes the four counties that border Lake Superior in Wisconsin:  Ashland, Bayfield, Douglas, and Iron Counties.  Here is a map of this area.

Check out the NCWMA August 2018 Newsletter!

NCWMA August 2018 Newsletter


NCWMA Brochure

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