What is best way to get rid of crab grass in a lawn.?

Answer 1

The best way to get rid of crabgrass is to not get it in the first place. This is done by using a preemergent, such as HALTS by Scotts in early spring, before it shows up. This actually prevents the crabgrass from germinating for about 4 months - which is most of its growing season.

If you didn't get that down in time (or at all) there are a couple options:

1) Pull it out by hand. This is feasible only if you don't have a large area to deal with.

2) Bayer All in One weed killer with crabgrass control works, as does Ortho Weed B Gon crabgrass killer, but you will typically have to do two applications, about 5-7 days apart to really kill the crabgrass.

Go to Scotts.com for more detailed information. They have quite a bit there. Their discussion forums are very active as well and have a lot of helpful people who are very happy to share their experience and knowledge.

Answer 2

You need to look for a post-emergent - see below from lowes.com

If crabgrass has already appeared in your grass, you still have options. If the seeds have already sprouted, the pre-emergent herbicide will do no good. Post-emergent herbicide products control crabgrass after it has already germinated.

Post-emergent herbicides work by killing the crabgrass plants. Apply these herbicides only to the crabgrass that is visible. Read and follow the manufacturer's directions on the product carefully because the amount of post-emergent herbicide that can be applied to your lawn safely depends on the type of grass you have.

Answer 3

If your grabgrass is already up and taking over here is my suggestion. Go to your local garden center, Home Depot, or Walmart, and buy a bag of "Scotts Turfbuilder Plus 2." It's kind of pricy (about $30.00 per 80# bag), but it is your best bet for controlling crabgrass, other broadleaf plants, and even dandilions. The best way to apply it is in the early morning while the dew is still on the ground. Or you can water the grass for a few minutes to get it wet and then applyit while the grass is still wet. It is best to use a "broadcast type spreader" to apply it evenly and avoid "burning" your grass. Then don't mow or water for at least two days and you should start seeing a difference in about a week.

Answer 4

apply crabgrass preventer (pre-emergent) in early spring.. but since you're asking now, you probably didn't do that.

Ortho is offering a weed-b-gone plus crabgrass killer in a ready to use spray.. look into that..

or you can putt out the crabgrasses by the roots..

good luck!

Answer 5

Use a pre-emergent herbicide. It is best to use around the time the lilacs are blooming.

Answer 6

Weed and feed.