Q: Is there a chemical method for controlling bermudagrass in St. Augustinegrass? Everything I have found says not to use it on St. Augustine.
A: This is a tough problem. There are no selective weed killers available to homeowners that will control bermudagrass without hurting St Augustinegrass. Perhaps the best route is to mow your St Augustinegrass lawn as high as you possibly can. Bermudagrass hates shade, so this will gradually wear it down. Bermudagrass also loves being fed, so fertilize your St Augustine lawn sparingly each year.