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If you only have a few crabgrass plants in your lawn, you can treat them with a ready-to-use product like Scotts® Spot Weed Control - For Lawns. ... You can also pull crabgrass by hand using a hand trowel or digging knife, but it should be done early in the season before the plants can produce seeds.

Crabgrass will die on its own in the fall, usually after first frost. However, if you don't remove it before it disperses its seeds, you will have to deal with the pesky weed again the following year. The best way to get rid of crabgrass is to remove the weedy clumps as you see them.

Glyphosate is a non-selective herbicide that can easily kill perennial weeds as well as your lawn grass. To get rid of crabgrass without killing lawn grasses such as Bermuda grass or St. Augustine, ensure that you don't apply too much Roundup.

The crabgrass will break down and disintegrate over winter anyway. ... Removing the dead crabgrass now is more cosmetic than anything. You won't make a noticeable dent in reducing the seed supply even if you got all of the plants out. It's also a little late to get new grass seed up and growing.Nov 24, 2009

One of the best ways to eliminate crabgrass without the help of chemicals is to prevent seed distribution. When you hand-pull grass patches from the ground, place them in a plastic bag and throw these bags immediately into the trashcan or landfill.Feb 13, 2019

The power rake will cut grooves into the dead crabgrass and other thatch, loosening it and bringing it to the surface. Rake away the dead crabgrass using a stiff-tined rake and dispose of the crabgrass in your compost bin or otherwise dispose of the thatch. Spread a one-half-inch layer of compost over the lawn area.

Crabgrass seeds use the warm spring and summer months to slowly populate your grass area. To combat these weeds and clear the area for reseeding, apply a pre-emergent crabgrass killer designed in the early spring. As the seeds try to germinate, they absorb the poison and die back.

The best thing to do once you notice unsightly crabgrass in your lawn is to act immediately and to control the weed before each season. However, if you have dead crabgrass in your lawn, you should still apply herbicide treatments to prevent the weeds from growing again.

Not all lawns need dethatching, but when your lawn does need it, knowing how to dethatch your lawn is crucial to its future. Done properly, dethatching helps restore your lawn to health and keep it beautiful in years to come. By learning why, when and how to dethatch, you can keep your thick, lush grass on track.