Remedy does a good job on mimosa and a lot of other weedy trees. The active ingredient is triclopyr. Some brush killer contains triclopyr and comes in pints and quarts. I buy Remedy by the gallon for about $100. I mix one quart Remedy and three quarts diesel fuel which is about the same percentage as the small bottles. Use it as a hack and squirt application or just brush it on the trunk of a small smooth bark tree or mix according to the label and spray over the top. You can get Remedy from Southern States co-op store and other farm supply stores.

Ichabod

Thanks ichabod! I will check around some farm supply places. Good to know someone else has had success with this.