There is much conversation about invasives. Below are lists of Minnesota and Wisconsin invasive plants.
Don’t allow invasive plants to flourish in your yard. Never purchase them or bring them into your yard, and please refrain from using chemicals on them. Pull them out and keep them from seeding.
Many invasive plants alter the soil so natives can’t grow, and crowd out the native plants
You will be surprised at some of the plants that are invasive. Below are links to the invasive plants of Wisconsin and Minnesota:
Minnesota invasive plants:
http://www.dnr.state.mn.us/invasives/terrestrialplants/index.html
Wisconsin Invasive plants:
http://dnr.wi.gov/files/pdf/pubs/fr/FR0464.p
“Invasive plants or weeds continue to spread across the continent. Consequently, Minnesota is fast becoming a melting pot of weed species. Many of these plants were accidentally introduced to our landscape, but some have been purposefully imported.” Bonnie Harper-Lore