Crabgrass is an annual grass that starts in spring from seed, grows through the summer, then dies in the fall. Seeds are produced within two weeks from sprouting and continue all summer long. Plants are easy to pick if there are just a few. To pick crabgrass, run your finger around the base of each plant to isolate it from the desired lawn grasses, then grab the center (plus a pinch of dirt) and pull back and forth and right and left while pulling up. The roots are very shallow and pull up easily.
Control: Keep the lawn mown tall to prevent seeds from starting. Do not water daily because seeds need daily watering to become established. Pick or spray existing plants with Ortho Crabgrass Killer or Bayer Advanced All-in-One Lawn Weed Killer. These chemicals will not damage the lawn grasses when used properly. Use a pre-emergent seed killer around mid-March and again in early July. The seeds will sprout but will be killed by the pre-emergent. Pre-emergent is like birth control because timing is everything. Using a pre-emergent in winter is a waste because crabgrass seeds are not sprouting; they wait until spring and so should you. A good pre-emergent is “Halts” by Scotts. It is available alone or in a fertilizer mix and is listed to control crabgrass.
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