garlic mustard seed.
My neighbor has large patches go garlic mustard seed and is not interested in taking care of them. How can I kill what creeps into my lawn? what herbicides do you recommend>
Hennepin County Minnesota
The first thing you should do is report it to the DNR. It's on the restricted invasives list. Report what is in your yard and ask that they speak to your neighbor. https://www.dnr.state.mn.us/invasives/terrestrial/report.html
I'm going to refer you to the DNR's site on managing garlic mustard. They recommend that if you treat it chemically, you hire a certified professional. If it's a small patch, you can manage with hand removal. The key is to remove before the plant flowers. https://www.mda.state.mn.us/plants/pestmanagement/weedcontrol/noxiouslist/garlicmustard