hey have u ever heard of honcho well they dont make it no more but it was the same company that makes roundup....anyways i used honcho to kill all the bermuda grass i had in the front yard and it was gone i even used it around my citrus, palms, nanas and killed the bermuda
its good
if u wanna get the grass on the flowerbeds just get a dropper and only get the grass it will only kill what is made contact with