Scott from Pittsburgh, Pa writes
Without killing the grass. If not any suggestions
Certainty Herbicide - 1.25 oz. cannot be used in cool season grasses and will harm them. We are not aware of any product labeled to control poa trivialis in a bluegrass lawn. In your case it would be best to spot treat the poa with a glyphosate based product such as GlyPhoSel Pro and reseed the area.
Answer last updated on: 05/22/2018