• Japanese knotweed must be picked up after cutting. Otherwise the pieces will start new plants

    Slide #1
  • Orange hawkweed is an aggressive competitor of other pasture and prairie plant species
    Slide #2
  • Creeping bellflower is slowly "creeping" into our gardens, fields and woods
    Slide #3
  • Common burdock's Velcro-like burs have been known to ensnarl birds, bats and butterflies

    Slide #4
  • Crown Vetch is known to climb over and shade out other plant species
    Slide #5
  • Porcelain berry before the berries turn shades of pink and purple
    Slide #6

Upcoming Events


Join IPAW at Where Ecology Meets Economy discussing how we can benefit from each other. More


IPAW Board of Directors meeting - 1-3 pm. Location to be announced.


IPAW will have an exhibit at the 2015 Midwest Environmental Education Conference (MEEC) Oct 21-22. More

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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