Invisible yellow patches can ruin the appearance of all lawns. There are plenty of myths about what causes these ugly, dead spots. Here are some of the real reasons why you may get stains, and several ways to fix them to make your lawn look lush and green again.
What causes yellow spots?
When yellow spots appear in your grass, dryness is often the culprit. Try watering the grass more often to see if this clears the problem. Adjust your sprinklers or how to water the grass with a garden hose. The yellow spots should be cleared up quickly if dryness is the problem. If you do not notice a change within two weeks, another lawn problem can cause these ugly patches to appear on your lawn.
If underwater is not guilty, get a pH kit to test your soil. These are simple and easy to use DIY kits that can be purchased in any home or garden store. Yellow patches can be an indication that you have too much nitrogen in the soil. Confirm it with a pH test that can show you the balance of the most important nutrients in your garden. Make sure you test soil under one of the yellow patches.
Dog urine can add excess nitrogen to your soil and create yellow patches as well. If the yellow patches appear in places that are frequently visited by your pet, these areas need extra care and attention.
Fertilizer is a simple solution when the soil pH is unbalanced. Water deep after applying fertilizer. You can add fertilizer to the entire lawn or focus only on areas with yellow patches. Too much fertilizer can also cause yellow patches, so don't overdo it.
Sometimes yellow patches are an indication of illness. Several types of fungal diseases can cause yellow spots. Screw back some of the yellow grass and see if you can see something that looks like it might be a fungus. The area can be immediately treated with fungicide to kill the bacteria and restore the health of your lawn.
There are several ways to prevent fungal growth in your lawn which can lead to yellow patches. Unplug your lawn and aerate it to keep it healthy and prevent fungus. If you see any fungus in your lawn, it is a good idea to relax and aerate the entire yard as it means you are probably late for this maintenance. All grass develops straw over time. This is a thick undergrowth that can prevent water from reaching your soil. Dethatching rakes can be used to remove this growth.
Mushrooms like moisture and thrive in places where water collects and does not drain well. If you have areas where water tends to stand in your lawn, you can improve drainage by aerating the soil. Water in the morning rather than later in the day, so the water will not sit on your lawn overnight. Keep your lawn free from clippings, leaves and sticks so that moisture does not get trapped.
Loving Your Lawn
Treat yellow patches as soon as they appear in your garden and correct the problem that causes these patches.  With regular maintenance and good continuous care you can prevent yellow spots. Keep your lawn aerated and unload it once every year or a few years. Water it well, fertilize it once a year and keep an eye out for problem areas that need extra treatment. As long as you do this, your lawn will continue to look green and beautiful.
Don't forget about human and animal disorders. Train pets to use the bathroom in several places, rather than going to the same or two places all the time. Try to keep foot traffic in paved areas. Yellow patches may appear in areas that are experiencing heavy walking and may indicate that a new walkway or route is needed.
Keep taking care of your lawn and it will look beautiful.