Chris from New Smyrna, Fl writes
Ferti-lome Brush Killer and Stump Killer is not specifically labeled for Mexican Petunia. We suggest trying Prime Source Triclopyr 3A or either digging these plants out, making sure to get all of their roots, or applying a glyphosate product such as Roundup QuickPro Herbicide which will kill anything it is applied to, and then digging up the roots to prevent regrowth.
Answer last updated on: 10/17/2018