David from Lake Park, Ga writes
I bought the Certainty for my crabgrass as a post-emergent. But I see a yard full of bluegrass now.
Certainty Herbicide is a post-emergent herbicide only. You should use a different product for your crabgrass pre-emergent, such as Dimension 2EW or Hi-Yield Weed and Grass Stopper.
Answer last updated on: 01/12/2019