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Blotchy yellow patches in a new lawn (8 months old)

Discussion in 'Lawns' started by Emmett Murphy, May 4, 2021.

  1. Emmett Murphy

    Emmett Murphy Apprentice Gardener

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    Hello,

    We would be very grateful for your advice about our lawn. We moved into our new new home (new build) in September 2020, in Cork, Ireland. The lawn had just been laid in July by the builders. The soil contained some stones so we removed those as best we could. We applied new seed to fill in the bare patches and in October we applied some autumn lawn care. In March we applied some fertiliser the gardening store supplied.

    However, as you can see in the photos, we have these yellow blotchy patches in the lawn. I would love to find a way to make it uniform green. I am not sure if the cause is the soil health, or if I misapplied the fetiliser, or just that we maybe used a different seed to the original.

    The yellowy ones, as you can see in the attached image, seem to be yellow at the root with more green grass pushing through now.

    Any advice would be greatly appreciated!

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  2. Loofah

    Loofah Well used member

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    Try digging in the middle of one of the barer patches (take turf off and then dig so you can replace) as builders are an absolute pain for leaving crud under the grass.
    Could also be non-uniform distribution of fertiliser and the weather has not been kind either. Is it well watered? Drainage is likely to be the culprit, be it because of hardcore or compaction (which is also very possibly due to builders!)
     
  3. Emmett Murphy

    Emmett Murphy Apprentice Gardener

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    Thank you. I will try to do that and post a photo.

    It is well watered. What would the remedy be if it's a drainage issue?
     
  4. Loofah

    Loofah Well used member

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    If it's rocks then dig them out, if it's compaction then try spiking and lifting
     
  5. JWK

    JWK Gardener

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    Looks like uneven distribution of fertiliser to me. Best to use a spreader and mark your runs with canes so you don't overlap, use half strength going on the longest run, then repeat at 90deg so as to ensure good even coverage.
     
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    • Emmett Murphy

      Emmett Murphy Apprentice Gardener

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      Thank you so much for the replies.

      The soil is pretty clean for about 12 cm / 5 inches and then there's a hard stoney base.

      For now, I will try spiking it everywhere and adding some topsoil.

      The grass had the same yellowy patches everywhere before I tried applying the fertiliser, but I'm happy to add more with a spreader if you think I should? Is there a particular fertiliser product you would recommend?




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