Oops! Somebody forgot their crabgrass preEmergent and now it looks like their bermuda grass is trying to grow in the shade. Won’t work. Lawn mower will help and there are several DIY formulations available for Post emergent crabgrass control. Just Google it and you’ll get dazed and amazed with 342,000 hits in .42 seconds. One “friendly” method is to dust it with baking soda! I just wish it was that easy to deal with nature’s best sunny lawn solution AKA crabgrass. In the southeast if you miss your preEmergent applications you will meet Mr Digitaria, or one of his cousins, during June at the latest. At that time he begins breaking thru you primary lawn grass, what ever that may be, to introduce himself. PreEmergents, by far, are the most efficient means of controlling crabgrass but you have to think ahead of the problem by several weeks. Make two applications: late winter and again six weeks later. Now if you miss that rather large window you will need to move on to plans B, C and D. You probably won’t have to cancel the summer vacation but you will need some crabgrass fight time and especially so if your lawn is large. A product called Quinclorac is the active ingredient in several of the DIY products. The percentage active seems to vary among the formulations. You will probably need two to three applications at seven day intervals to beat the beast into submission and then, by label law, you may need to change armament for a final assault before frost gets it. That will depend on your mowing frequency and our summer rainfall amounts.