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Nutgrass in Lawns - How to Eradicate

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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  • PRO

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

  • There are a few herbicides out there specifically for nut grass. I've used Ortho Nutsedge Killer which worked great.

    Believe it or not but you can also use sugar as a natural treatment.

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  • PRO

    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.

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

    • PRO

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

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

    • PRO

      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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