Pulling up crabgrass - waste of time?

hsvcara((Alabama - 7))August 28, 2008

my backyard is 75% weeds, with the majority being crabgrass.

I've been pulling this stuff up all over the place and I'm beginning to wonder if it's futile.

If I leave the crabgrass, will it spread over the winter? When does it die?

The crabgrass has totally infiltrated my common bermuda (it even looks ok from a distance when recently mowed) so I'm wondering what will happen next spring.

Do I apply a post-emergent this fall? I know I'll need to use a pre-m in the spring.

My main question is: if I let this crabgrass be, what will happen??

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Yes it is a waste, it will die with the first hard frost. Did you apply a pre-emergent?

    Bookmark   August 28, 2008 at 12:55PM
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I'm in the same boat, I think my back yard is 90% crab grass. I'm totally new to having a lawn (just bought the house last year) and I didn't think to apply something to it to prevent crab grass....next year (or do I apply this now?).

    Bookmark   August 28, 2008 at 1:34PM
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hsvcara((Alabama - 7))

No I didn't apply a pre-m :( Live and learn!

If it dies, will it just eventually break down or am I gonna have clumps everywhere?

    Bookmark   August 28, 2008 at 2:54PM
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It actually depends. If you have a very thick stand of crabgrass and intend to overseed, it can be problematic.

The CG will make life tough for your new little seedlings to get established. If you can remove the CG by hand before overseeding, you will be helping yourself. You can also spray with RoundUp, give it a week to wither away, and then scalp the lawn with your mower before overseeding.

Once the first hard frost comes along, the CG is a goner but it will come back next year without treatment. Pulling the CG will only have a limited effect on the CG you see next year.

    Bookmark   August 28, 2008 at 7:01PM
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Apply pre emergent in Oct..About the end of Fed when the Bermuda is 100% dorment apply round up..Then in March apply pre emergent..Then in June I would aerate and apply some seed..

    Bookmark   August 28, 2008 at 7:15PM
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gardenfanatic(MO zone5b)

My advice is the opposite of everyone else's. Pull it up now so it doesn't reseed, and since the soil will already be disturbed from the weed pulling, plant grass seed in the bare spots where the crabgrass was. That's what I've done in the past, and it worked well. Fall planted grass seed has a better survival rate anyway.

Then in the spring put down pre-emergent.

    Bookmark   August 30, 2008 at 12:28AM
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