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 ...

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 ...