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Nutgrass in Lawns - How to Eradicate

Posted by Scott H on September 5, 2018 at 9:54pm in Turfcare

One of the lawns I cut has become infested with Nutgrass this year.

Customer was quite happy with it while the grass was dormant - it kept growing and gave some green the the lawn areas.

The grass is just starting to grow again and I've been asked how to get rid of the nutgrass. Looking it up it is a member of the sedge family, and has rhizomes and tubers by the plenty - borne out by some I removed from the border this week with near 12" long root systems.

How do I set about killing them off, looks like a one or two season job, just knocking off the tops isn't going to work.

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Replies

  • PRO
    Hamilton Black September 8, 2018 at 10:37am

    I would be tempted to Glyphosate and re-seed if the area is not too big.

  • paul van schalkwyk September 9, 2018 at 10:09am

    There are a few herbicides out there specifically for nut grass. I've used Ortho Nutsedge Killer which worked great. https://www.ebay.co.uk/p/ORTHO-Weed-b-gon-Nutsedge-Killer-24-Oz/100...

    Believe it or not but you can also use sugar as a natural treatment. https://www.wikihow.com/Get-Rid-of-Nutgrass

    ORTHO Weed-b-gon Nutsedge Killer 24 Oz. | eBay
    Find great deals for ORTHO Weed-b-gon Nutsedge Killer 24 Oz.. Shop with confidence on eBay!
  • Scott H September 9, 2018 at 11:55am

    Thanks for your help, glyphosate spraying is not on the cards at the moment, the lawn is 450 sq m, wiith about a quarter of that being fulll of nutgrass. 

    I've contacted Nufarm and their advice is Depitox, and regular weed wiping using glyphosate. Looks like it is going to be a ongoing job.

    I've seen the specific treatments for sedge available in the US but they don't carry EU approval so I can't use them.

    Someone told me about the 'sugar way', I'm a bit sceptical to be honest, certainly worth a go next spring.

  • Gareth September 9, 2018 at 9:00pm

    Have you got any pictures of the weed? I'm not familiar with nutgrass as s uk lawn weed. Big in the USA though? 

    • Scott H > Gareth September 11, 2018 at 10:44am

      I'm due a visit next week, will take a couple of pics

  • 1st Garden Maintenance September 11, 2018 at 10:07am

    If you can't kill it with a netsedge killer, cover the area with sugar.

    • Scott H > 1st Garden Maintenance September 11, 2018 at 10:46am

      Yeah I read about the 'sugar method' Adrian, have you used it? 

      I'm wondering about the rhizome type roots, it is ok killing the tops but of the roots are not killed they will come straight back up, won't they?

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