How do you kill crabgrass in lawns?


Quick Answer

Crabgrass is a nasty and common weed grass that is difficult to kill and keep from coming back the next season. Crabgrass thrives in full sun and high temperatures and dies at the end of the year. Scotts Miracle-Gro describes a simple way to remove crabgrass and keep it from becoming a nuisance.

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Full Answer

  1. Remove crabgrass as soon as you see it

    Crabgrass is so fertile that it spreads thousands of seeds that grow the next spring. When you find crabgrass, water the area thoroughly to loosen the dirt and increase your chances of pulling the weed grass out by the root systems. Once the ground is soft, simply pluck out the crabgrass by hand.

  2. Add pre-emergent herbicides

    Apply pre-emergent herbicides in the late winter and early spring when soil temperatures stabilize. The temperature should be around 55 degrees Fahrenheit at a depth of 4 inches. Purchase an inexpensive soil thermometer if you don?t know when to time your application.

  3. Apply fertilizer

    Fertilizer is crucial when it comes to healthy soil. It adds nutrients to your dirt and helps thicken the turf, which in turn helps reduce crabgrass seeds that weren?t killed by the herbicides. Apply the fertilizer along with your herbicide.

  4. Be on the lookout

    Watch for new growth of crabgrass and simply pluck it out by hand when you discover any new patches.

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