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 ...

To note: The active ingredient is ineffective against crabgrass. Sometimes prevention is the best cure. In that case, you’ll want a pre-emergent weed killer for lawn—i.e., a weed preventer.

Quali-Pro's Prodiamine 65 WDG provides pre-emergent grass and broadleaf weed control. Flexible application allows for both spring and fall use providing season long crabgrass control. Available in ...

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 ...