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I live in southeast Michigan. I built my house 2 years ago and had sod laid down last year.

I was told to water twice a day at least. The grass has held in and it came green during this season with no issues. I have reduced the watering to a single time a day and everything was perfect.

Suddenly within 2 days yellow spots appeared in different areas of the lawn.

I used Grub control in May of this year.
I used Scott turf builder weed and feed in June. I applied grass food in July.

What is causing these yellow spots? How do I fix them?

Update: here are some pictures from different areas. enter image description here

enter image description here

this is close to the garage enter image description here

and here is another picture in my back yard all by it self enter image description here

this one is next to the side walk(and could be dog pee) enter image description here

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    Please post a photograph of the affected areas. Thanks! – Niall C. Jul 18 '16 at 20:25
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    Hi and thank you for the question. Are you able to post a photo of the lawn showing the spots themselves as well as their location within the landscape? This will be of great value in helping people to identify the issue. – That Idiot Jul 18 '16 at 20:27
  • Interesting...were you there when they laid the sod? Do you know how they prepared the lawn bed? And please, hear what I say, do NOT ever apply chemicals that you do not understand! Especially grub control!! That actually sets you up for huge infestations the next year that will kill grass. You kill all the beneficials that CONTROL populations of grubs. Once one kills EVERYTHING in the soil, you are so (is it ok to say) screwed!! Find out if they rolled the lawn bed before laying the sod. Please send more pictures...and tell us you maintenance practice/watering. – stormy Jul 19 '16 at 1:32
  • And you NEVER water every day...read some of the other threads on lawn care, watering, fertilizing that are on this site. They are precious. – stormy Jul 19 '16 at 1:34
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    get a spade and dig a six inch deep test hole in one of the dead areas. Whatever it is the cause is underground! – kevinsky Jul 21 '16 at 16:55
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Yes. I walk in my suburban neighborhood. Most laws are very green except for an expanse that is near the sidewalk, which has yellow patches of various diameters. This is where dogs are walked daily.

I agree, it only takes one pee and the yellow appears. I like dogs and cats, so I don't mind.

  • One of the small spots is near the side walk but the others are not. – muthanna Al-Jelihawi Jul 20 '16 at 19:55

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