sod over crabgrass.

Discussion in 'Turf Renovation' started by RigglePLC, Aug 29, 2012.

  1. Patriot Services

    Patriot Services LawnSite Fanatic
    Posts: 12,532

    The problem comes with the clumping grasses. You scalp them down but a clump still remains and the finished product looks like crap. Those clumps also inhibit the roots from getting to the soil.
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  2. Smallaxe

    Smallaxe LawnSite Fanatic
    Posts: 10,080

    It seems there is plenty of testimonials from both South and North in regards to laying sod over the existing lawn... my concern would be too much living material rotting and causing disease problems so mowing it short or glyphosate it would be the goal sure thing to do...

    Sounds like we have a winner... :)
     
  3. RigglePLC

    RigglePLC LawnSite Fanatic
    Posts: 11,911

    New sod laid directly over crabgrass is looking slightly better. I was more careful about watering it every day for 3 minutes.
    The crabgrass underneath the sod is dead and collapsed. Sod was laid on August 24, 2012, now 17 days afterwards. Weather was about 10 days dry and 85 degrees.

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    Last edited: Sep 4, 2012
  4. Patriot Services

    Patriot Services LawnSite Fanatic
    Posts: 12,532

    Put a few pieces down and see if the CG doesn't grow up between them.
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  5. lawns Etc

    lawns Etc LawnSite Silver Member
    Posts: 2,272

    If you did it now the crab is in its final tiller in most cases in the northern or mid atlantic areas so it wont compete as much against the sod I have seen many a yard done this time of yr just thrown down over and it takes very well. I am sodding my personal lawn with bluegrass on Friday I sprayed everything with gly and mowed to the dirt I could probally lay right over but I'm going to powerrake it twice just before laying the sod.
     
  6. Patriot Services

    Patriot Services LawnSite Fanatic
    Posts: 12,532

    Pray your pre em gets to the seeds already dropped next year before they germinate.
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  7. lawns Etc

    lawns Etc LawnSite Silver Member
    Posts: 2,272

    In my personal lawn there was no cg
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  8. RigglePLC

    RigglePLC LawnSite Fanatic
    Posts: 11,911

    Good question, Patriot,
    Is the seed present now mature enough to germinate and grow...or...must it remain on the plant for a few more weeks to reach seed maturity?
    Does short mowing reduce the amount of seed for next year...or...is this going to make only a tiny difference?
     
  9. Smallaxe

    Smallaxe LawnSite Fanatic
    Posts: 10,080

    CG seed only germinates when it has a barespot of dirt and baking in the sun where nothing else is growing... the seed under the sod doesn't stand a chance unless the sod deteriorates of comes up between the cracks next Spring...
    All those same seeds would be there, even if the ground was tilled...
     
  10. Patriot Services

    Patriot Services LawnSite Fanatic
    Posts: 12,532

    Not around here CG will pop up in the healthiest of SA even with two rounds of pre em at 3 month spacing. My experience has been there will always be a small amount to control. 100% CG free is not possible. Spray, scalp, mow, smother, spray again and you still will have some to deal with. It's all about a tolerance level for the customer.
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