More than Bermuda or even Kentucky blue grass, crabgrass is probably the most common--and least desired--grass that sprouts in yards. Not only does crabgrass alter the appearance of a lawn, but if left unaddressed, it can also compromise a lawn's health. Crabgrass sprouts in the spring and grows rampantly during the summer, but gardeners who are vigilant and consistent in the care of their turf can successfully remove lawn nuisance.
Remove the crabgrass as soon as it is visible. Water the area thoroughly where the crabgrass is sprouting to help remove the roots. Lift the patch of crabgrass and its roots with your hands. Mulch the soil around the area where the crabgrass was removed to prevent future outbreaks.
Use a post-emergent herbicide. Spray young crabgrass plants with a chemical such as Acclaim Extra to get rid of the weed. Examine your turf closely as crabgrass at this stage is very small and can be difficult to detect. Treat only the area where the crabgrass has sprouted to prevent damaging unaffected areas of the lawn.
Use the highest setting available on your lawnmower and keep your lawn mowed at the correct height, 2 to 3 inches high. Avoid giving crabgrass the light it needs to germinate which easily occurs in lawns that are cut too low.