Like a lot of invasive species that are causing problems now, people imported Japanese and Bohemian knotweed to America because it was pretty.
All these years later, though, we know the knotweed is a serious problem for the environment -- and for the foundation of your house.
More information on tomorrow evening's Invasive Bohemian and Japanese Knotweed Workshop is here, and you can learn more about Duluth's Collaborative Invasive Species Management Area (CISMA) here