Q: I have pennywort in my St Augustine lawn. How can I control it?
A: Like its weedy cousin, creeping Charlie, pennywort is tough to eradicate. Any of the three-way broadleaf weedkillers will give moderate control but products that contain carfentrazone or quinclorac are better. Repeat sprays are necessary. Rather than give you brand names, I’m going to give you homework to read product ingredient labels. This will also inspire you to read and understand which lawn grasses these two chemicals can be used on. Remember too that pennywort loves damp soil. A dry summer will control the weed on its own.