Randy from Louisville, Ky writes
TZone SE Herbicide is a broadleaf weed killer only and will not prevent or kill crabgrass. You do have to wait until after the second mowing of newly planted seeds to apply this herbicide, per the product label. To prevent crabgrass you would use something like Dimension 2EW or Prodiamine applied before soil temps reach 55 degrees in the spring.
Answer last updated on: 10/01/2018