 Well, you may get your best success by hiring a lawn company to come spray your yard. They'll be able to get rid of it very well if you have crabgrass. They'll use a crabgrass killer spray, and they'll take it out. They may have to do a couple applications to get complete control. But if you want to do it yourself or someone you know do it for you, then you need to locate a crabgrass product or a...