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The Home Depot

Why is My Grass Turning Yellow?

Pro Referral > Home Guides > Landscaping > Why is My Grass Turning Yellow?
Why is My Grass Turning Yellow?

While a well maintained and manicured lawn adds a considerable deal to the appeal and value of a home, one that looks as if it has not been cared for has the opposite effect. Rich green grass turning yellow is a common problem that many homeowners face. It can start with just one or two spots of yellow that can be easily overlooked, but it could soon spread to cover the whole lawn and give it a sickly look that impacts the overall appearance of a home.


It is normal for your lawn to change shades to some extent as the seasons vary, but the overall green look of the grass should remain throughout the year. When you find spots or patches of yellow in your grass, there is no need to panic. The situation can be corrected, but the first thing to do is to find the cause of the problem. When the grass starts turning yellow, it is an indication of either something missing in the natural environment or the presence of something that should not be there. A logical process of examination and elimination will allow you to find out what is wrong in order to take action and correct the situation.

  1. 1.Excess Heat

    Excess heat can cause the grass to dry out more quickly than normal and lead it to turn yellow. This is common if the root system of the lawn is very shallow. Heat radiation causes the upper grass to lose moisture and eventually turn yellow. A single very hot day or a week or two of unusually warm temperatures can generate this to happen. The short term cure is to increase the amount of watering when the weather is warm. In the long term, the root system can be pushed deeper by reducing the frequency of watering in cooler temperatures (if it is not raining enough already―be careful not to flood your grass) while simultaneously increasing the amount of water given each time.

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  3. 2.Drought

    Unusually dry weather, even if the temperatures are not high, can also rob the grass of its moisture and cause it to turn yellow. You may not notice a drop in relative humidity levels, but the grass will. The dry air will suck the moisture from the grass and as it dries, it will lose its green hue and start to turn yellow. The solution to this problem is to increase the frequency of watering, being careful not to over water the earth. The idea is to keep the ground damp so that the roots can draw moisture in order to replace what is being lost to the dry air.

  4. 3.Insects

    If climatic conditions are not the cause of your grass turning yellow, get on your knees to examine the grass and ground carefully. If you see holes in the grass or bored into the ground, insect eggs, or unusual spots, it typically indicates the presence of unwanted pests that could be feeding on the grass and depriving it of its natural nutrients. The solution is to use insecticides to kill off the infestation, after which the grass should return to normal.

  5. 4.Disease

    Another cause of grass turning yellow is disease. Like all living things, grass too is prone to infection. Disease stems from a variety of problems such as fungus, plant diseases of all kinds, and even infection caused by pollution. The best thing to do if you suspect that you have diseased grass is to consult a professional landscaper who will be able to test the grass and determine the exact nature of the infection, as well as advise you on the best course of treatment.

  6. 5.Cutting too Close

    Cutting the grass too close is another way your grass can turn yellow. For grass to fully develop and retain their color, optimum lengths must be reached depending on the type of grass you have. Cutting grass too short will weaken it and eliminate its natural ability to absorb moisture, leading it to turn yellow. Additionally, very short grass leaves the earth below it exposed to harsh sunlight and air that will suck the dampness from the soil.

  7. 6.Dog Urine

    Dog urine is a common cause of grass turning yellow. Dog urine and feces both contain high levels of nitrogen which can cause grass to burn and turn yellow. If you have a dog, the only way to control this is to have an area of gravel in your lawn and train the dog to use only this. If you don’t have a dog, but find yellow spots along the periphery, it could be that other dogs are using your lawn as a toilet. The solution here would be to put a small picket or other type of fence to prevent dogs from getting on the grass.


    The dog would have to be going to the bathroom in the same spot repeatedly for this to happen. That is possible, but unlikely. Your dog would have to urinate excessively for this to occur.

  8. 7.Incorrect Herbicides

    If your lawn was treated with herbicides, this too can cause the grass to turn yellow. If the herbicide was the correct type for your lawn, the yellowness should have disappeared very quickly on its own. If the wrong type of herbicide was used however, professional care may be required to bring back its green color

  9. 8.Find a Landscaper with Pro Referral

    Finding a professional landscaper to help fix yellow grass can be a time-consuming process. Going to Pro Referral and listing your requirements takes less than a minute. Each Pro is background checked and licensed and insured so that you can hire with confidence. Read the customer reviews, credentials, and business profiles of all of our Pros and let a qualified professional turn a difficult project into a completed one!

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