• Crown vetch has rhizomes that can grow up to 10 feet long
    Slide #1
  • Two IPAW Board members honored at this year's Invader Crusader Award Ceremony
    Slide #2
  • Beware of the sap of this plant (wild parsnip)
    Slide #3
  • Creeping bell flower is one invasive that can regenerate from a small fraction of a root
    Slide #4
  • The IPAW booth at the Wisconsin Wetland's Association meeting in 2016
    Slide #5
  • Japanese knotweed is known to disrupt water lines and housing foundations
    Slide #6

Upcoming Events


Invasive Species Awareness Month Consider doing one thing this month to combat invasive species.


Come learn about invasive species at the IPAW booth at WI Farm Technology Days in Algoma, WI - runs July 11-13.


IPAW Board Meeting & Retreat 9 am-3 pm at The Friends Gathering Space, 4200 Park Road, Wausau, WI

Other Invasive-Related Events

Welcome to Our Website

IPAW logo"Slowly, but persistently, making their way across the land, ecologically invasive plants are the silent invaders of our time" quoted from Elizabeth J. Czarapata's book Invasive Plants of the Upper Midwest. Most of us don't even know they exist. We have the illusion of lush, green landscapes, when in fact, much of what we see are invasive plant species. In reality, invasive species have contributed directly to the decline of 49% of threatened or endangered species in the United States. The annual cost to the United States economy is estimated at $138 billion a year, with over 100 million acres suffering from invasive plant infestations. Because there is a need for a greater understanding, it is IPAW's mission "to promote better stewardship of the Natural Resources of Wisconsin by advancing the understanding of invasive plants and encouraging the control of their spread."

We invite you to take a look at our website, and we hope to persuade you about the importance of controlling invasive plant species in Wisconsin... or wherever you may live.

New Threats to Wisconsin

Besides these, you can learn about more New Threats in our newsletter

Japanese stilt grass
Japanese stilt grass

It's almost here! Japanese stilt grass is currently found in Illinois, less than 15 miles from the Wisconsin border.

Porcelain berry
Porcelain berry

A climbing vine in the grape family, first introduced as an ornamental landscape plant from temperate Asia.

Japanese hedge parsley
Japanese hedgeparsley

A member of the carrot family, this species is rapidly spreading and has the potential to invade to most regions of the state.


Our Mission

"To promote better stewardship of the natural resources of Wisconsin by advancing the understanding of invasive plants and encouraging the control of their spread."

Contact Us

PO Box 5274
Madison, WI 53705-0274
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