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Discussion in 'Turf Renovation' started by catri360, Apr 25, 2011.

  1. catri360

    catri360 LawnSite Member
    Messages: 3

    I'm going to be installing new sod and was wondering if I need to kill old grass with roundup or if just using a tiller would be ok to prepare the area, thanks.
  2. FuturePilot4u

    FuturePilot4u LawnSite Senior Member
    Messages: 377

    Round up may affect the new sod.
    Posted via Mobile Device
  3. Dr.NewEarth

    Dr.NewEarth LawnSite Bronze Member
    Messages: 1,476

    If it's not really weedy with dandelions, you can cut the grass to scalp level
    topdress, fix the pH, use a quality starter fertilizer and lay the sod right over top if you like. The old grass decomposes and turns into nitrogen. I do it this way quite often.

    For round-up to work properly it must be 70 ferenheit for a few days.
    Read the directions and use your safety gear

    You can rototill if you like. All of that extra work and raking really turns me off.

    The only way I would need to remove the old sod is if it would leave the lawn area too high by laying the new sod over top.

    Or, you can just remove the sod a few inches wide around the perimeter, so the new sod
    slopes down to sidewalks and stuff...just an example.
  4. PerfectEarth

    PerfectEarth LawnSite Bronze Member
    Messages: 1,734

    Roundup will have no residual affect on new sod- just don't throw it down immediately or anything!

    You can lightly till.... I wouldn't go really aggressively because you're just creating more work for yourself (raking it out, re-grading it, etc)

    If you scalp it down and spray it off, you'll see where the lows and highs are- you can add some nice screened soil to spread out over the dead turf... fill in where needed and amend the soil a bit with light tilling (like a high rpm tiller, Stihl, Mantis....)
  5. BlazerRidge

    BlazerRidge LawnSite Member
    Messages: 221

    What do you use to topdress it ?
  6. Dr.NewEarth

    Dr.NewEarth LawnSite Bronze Member
    Messages: 1,476

    Use Top soil as a top dressing, sorry.

    One cubic yard will cover an area approximately one inch deep and
    30 feet by 30 feet
    for example...
    or three inches deep will cover around ten feet by ten feet...
  7. jaybow

    jaybow LawnSite Bronze Member
    from Mi
    Messages: 1,089

    I haven't done sod before, but never realized you could just scalp and topdress before laying sod.
    Posted via Mobile Device
  8. orlawncaresvc

    orlawncaresvc LawnSite Senior Member
    Messages: 962

    We will be doing a new sod job at the end of May. We will be spaying the existing lawn which is tall fescue with Round Up Pro. If you do the spraying with a few weeks in advance there will be nothing to worry about. You won't hurt the new sod.
  9. Dr.NewEarth

    Dr.NewEarth LawnSite Bronze Member
    Messages: 1,476

    Yes, I like to work smarter not harder.
  10. Snyder's Lawn Inc

    Snyder's Lawn Inc LawnSite Platinum Member
    Messages: 4,530

    Roundup only kills what it touches once its dried its done
    But if you want a good kill You need to spray atleast week before you till the lawn for laying sod

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