Lawn Diseases

Diseases are not limited to just trees, people, and animals. Lawns can also get sick and die. These diseases are generally not harmful at all to humans but can produce a huge eye sore and ruin your home’s curb appeal. It can also be hard to control so it is important to get rid of them while you can, as fast as you can. Just like any other plant issue, it is important to take in more than one fact when identifying a lawn disease. Google can be a great tool to find out what is going on with your lawn. It could be something going around in your area just like the stomach bug. You may be able to salvage your lawn from becoming too infected.

There are 5 common lawn diseases that may affect your home. They include brown patch, powdery mildew, red thread, snow mold, and fair ring.  They can all kind of look similar but vary with intensity, length of time they last, and how to treat them. Some of these come with bad weather and are hard to correct and others can be fixed very easily. Always keep an eye out for strange things in your lawn. It is best to keep up with a regimen for your lawn. It is important to give your lawn what it needs in a timely manner. Water regularly and fertilize as needed.

Brown Patch

This is one of those diseases that comes with certain weather conditions and can be very hard to fix. This happens in hot humid summer weather. They appear as brownish yellow patches in various diameters which will appear all over the lawn. Only the blades of grass that we see are generally affected with this disease. The roots will not be harmed or killed off. This happens when it gets to be super hot and humid and night time temperatures do not fall below 68 degrees. Other factors include having poor drainage and lack of airflow in the grass. Prevention is really the only way to not get brown patch. It is important not to over water or over fertilize the lawn. Aerating your lawn will help tremendously to avoid brown patches in your lawn.

Powdery Mildew

This is not harmful at all to the plant it grows on to. Basically any plant can be subject to this fungus though some are more prone to it than others. The fungus itself will not harm the plant, if the powder takes over too much of the plant surface photosynthesis will not occur. The fungus grows during high humid settings but not in rainy seasons or super hot temperatures. It is best to just remove infected plant matter. It thrives on new or young plants so wait a little before fertilizing or replacing infected areas.

Red Thread

Another low threat issue that takes place when the lawn is low in nitrogen and high humidity. This can be a great indicator that it is time to fertilize your lawn. Your lawn will have these red or pink colored thread like webbing. It can be treated with chemical fungicides but it should only need more fertilizer in order for it to be treated.


Snow Fungus

Common in the north where it snows and gets cold. The spores of the fungus will stay down in the soil until it gets a little cooler out. The spores will not grow or move around until the fall. They will not die off due to the summer heat, but will just exist until it is time to grow. The snow will actually help keep the spores moist and able to survive during the winter months. The fungus will be inactive when it drops below 32 degrees or raises above 60 degrees. It is not a guarantee that if it snows, you will get this fungus. It does take the right circumstances for it to happen. If it snows while the ground is not fully frozen, it is more likely for the fungus to grow in the spring. If it is a lighter winter and does not snow all that much, the fungus may not grow at all because the spores have not been insulated or kept moist by the snow. If you do see the fungus growing it is best to aerate the ground in order to help dry out the grass to prevent further growth. Avoid using chemical fungicides if possible.

Fairy Rings

This may be the strangest of all the lawn diseases. The name comes from an old folk tale. People believe that these rings appear where a fairy was dancing the night before. It actually is a ring that develops in the lawn usually accompanied by mushrooms. The rings can be up to 30 feet in diameter and are hard to get rid of. It can actually become very harmful to the grass. The fungus will dry out the soil and kill the grass. When the soil gets dried out, it becomes difficult to wet again and the roots do not get the water and nutrients they need to survive. The fungus mainly grows in soil that is more sandy by composition. For this issue it is necessary to use a chemical fungicide solution to kill the disease, there is no natural or quick fix to this disease.