Apply before the next weather system hits. This granular seed killer will keep the worst of early spring foxtails, dandelions, and horehounds from emerging in rock lawns and flowerbeds. Preventer must be applied before the weeds emerge or it will be too late to be effective.  Watters really negotiates hard for a good price on this key garden product.  A bag cover 5000 sq.ft and cost under $30.

Hi-Yield Weed and Grass Stopper that contains Dimension is an herbicide that provides pre-emergent control of crabgrass and other weeds that are also listed on the product label. This herbicide provides control of these weeds before they germinate. Moreover, Hi-Yield Weed and Grass Stopped is a post-emergent herbicide to control crabgrass even after it has germinated and emerged from the ground.