Envoy, Fusilade or Vantage can control actively growing grasses, which are summer annuals, if sprayed over the top of ornamental beds. Attack dandelions, a broadleaf perennial, using non-selective herbicides, such as Roundup or Finale. Do not spray these over ornamentals, which could become injured. Kill dandelions instead by spot treatment.
About this Author
Rogue Parrish has written two travel books and edited at the "The Baltimore Sun," "The Washington Post" and the Alaska Newspapers company. She began writing professionally in 1975. Parrish holds a summa cum laude Bachelor of Science degree in journalism from the University of Maryland.