Bermuda grass is a lawn grass that will eventually cover the whole yard, offering a thick carpet for kids to play on. But it isn't all good. This grass is a creeping grass that spreads out along the surface, and because of this, Bermuda tries to go places that you don't want it to grow, such as gardens or flower beds. There are a few ways you can prevent this from happening if you maintain your lawn regularly.
Install a garden border designed to keep out grasses and weeds that creep. The borders go part way into the ground and extend several inches above ground. This blocks plants and grass from growing into other areas of your landscape.
Trim creeping Bermuda along the borders of the lawn with a weed trimmer. Do this every time you mow the lawn, so that the Bermuda doesn't get out of hand.
Dig a 4-inch trench around your lawn to keep Bermuda from making its way across to landscaping. This way, you can see the grass as it creeps across and you can trim it easily without harming lawn or landscaping.
Spray an herbicide along the edge of your lawn to prevent the grass from growing further. For a more natural killer and deterrent, use vinegar. You can also sprinkle salt. Salt will make soil unable to grow anything for a while. Adding it along the borders will prevent the Bermuda from growing across.