Knowledgebase
Knotweed #869446
Asked May 21, 2024, 12:25 PM EDT
Mille Lacs County Minnesota
Expert Response
Bummer! Japanese Knotweed is a big problem in Minnesota and other states. You do not want to mow it or cut it but you do want to stop it from spreading by seed. Cutting it can increase the root rhyzome and cause it to spread more.
Control is usually with herbicides. You can contact your local county extension office through the link below under prevention and management.
https://www.mda.state.mn.us/plants/pestmanagement/weedcontrol/noxiouslist/knotweed