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Kewaunee County Wisconsin
Invasive species are a growing environmental and economic threat to Kewaunee County and coastal resources.

The current threats posed by invasive species are significant. Invasive species are degrading the county’s forests, grasslands, waterways, and beaches, impacting agriculture, and reducing the enjoyment of recreation areas and trails. 

The biggest threats and highest priorities include the following: (some present/abundant, while others have not yet been found in the county, but their detection is a priority under NR-40): Phragmities, Chinese Yam, Marsh Thistle, Flowering Rush, Japanese knotweed, Leafy Spurge, Oriental bittersweet, Purple loosestrife, Swallow-wort, Tall manna grass, Wild parsnip, Teasel, Curly-Leaf Pondweed, Rusty Crayfish, Eurasian Water-Milfoil, Zebra mussel, Starry Stonewort, Yellow Iris, Aquatic forget-me-not, and narrow-leaf cattail.

Kewaunee County Phragmites Control Project 2023

Since 2014, Glacierland Resource Conservation and Development Council, Inc, Stantec Consulting Services Inc, and Lakeshore Natural Resource Partnership, have been developing the most comprehensive invasive species control program in Wisconsin. Together with many partners, we have identified, mapped, and treated thousands of invasive species populations across Manitowoc, Sheboygan, Ozaukee, Calumet, Kewaunee, Brown, Outagamie and Fond du Lac counties. Our primary target invasive species is non-native Phragmites, which takes over large areas, pushes out native vegetation, and reduces habitat quality for wildlife. In 2023, we received funding from the WI-DNR to start treating properties in Kewaunee County. The current grant provides for treatments of non-native Phragmites in the towns of Carlton and West Kewaunee for the next two to three years. Additional funding is being sought to continue and expand treatments of non-native Phragmites in the rest of Kewaunee County in 2024 and subsequent years.

Phragmites grows rapidly and quickly develops large underground root systems, making control especially difficult. Invasive Phragmites invades our wetlands, shores, and waterways. It can form dense, impenetrable stands that choke wetlands streams, beaches, and shores. Dense stands result in reduced plant species diversity and wildlife habitat quality. Long-term control over the course of many years is essential to protect habitat quality, water quality, access to shorelines and property values. We have made significant progress mitigating the spread of Phragmites, and work to establish multiple years of consecutive control in the areas we treat.

We are asking landowners to report any populations of Phragmites on their property on our project web map  or call Jake Divine at (906) 284-0533 to report a population. If you are not familiar with Phragmites, the Great Lakes Phragmites Collaborative has great resources on their website at to help you identify invasive Phragmites.

To learn more about the Phragmites Control Program or submit a permission form please visit For any questions at all on the program, please reach out to Jake Divine at or (906) 284-0533.