One reviewer noted that Preen isn't a crabgrass killer but a preventer ... p-ethyl for controlling late-season weed germination. Scotts Halts had the best reviews of all the products we considered ...

We have also found that it provides suppression of crabgrass, which is a common problem in many lawns. One of the best things about Southern Ag Atrazine St. Augustine Grass Weed Killer is that it ...

Crabgrass is best controlled with herbicides commonly referred to as preemergence or preventers. These chemicals kill the weeds as ... be applied just before the weed seeds germinate.

Or head straight for a weed killer to eliminate these unwanted plants ... Related: How To Get Rid Of Crabgrass That's Growing In Your Lawn And Prevent It From Coming Back ...