• Garlic Mustard produces allelochemicals which can effect the growth of our native forest trees
    Slide #1
  • Dame's Rocket which has 4 petals is often mistaken for woodland phlox which has 5 petals
    Slide #2
  • Cutting Black Locust without herbicides will stimulate growth and spread
    Slide #3
  • Japanese Knotweed spreads by rhizomes which are strong enough to damage pavements
    Slide #4
  • Crown Vetch is known to climb over and shade out other plant species
    Slide #5
  • Leafy Spurge can reduce the productivity of grazing land from 50-75%
    Slide #6

Upcoming Events


Deadline for the Invasive Species Awareness Month "Protect the Places You Play" video contest. More


Invasive Species Awareness Month begins. The entire month of June is dedicated to invasive species. More


IPAW Board of Directors Meeting date, time and place to be announced.

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

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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