Yep, the Hi-Yield 21416 can be used on established grass because it is a selective herbicide that targets weeds, not grasses. It contains the active ingredient 2,4-D which is a widely used weed killer ...
If you're here searching for an effective herbicide for controlling thistles in flower beds, the Green Gobbler 20% Vinegar Weed & Grass Killer is a great choice ... mesotrione. So it has selective ...