The answer to 'why is my lawn disease' is that there are several common causes of lawn diseases, including fungal infections, bacterial infections, and environmental stressors. Some common symptoms of lawn disease include discolored or wilting grass, the presence of fungal growths, and the development of bare or thinning patches.
If you suspect your lawn has a disease, it's best to first try to identify the specific cause. This may involve examining the grass closely, taking soil samples, or consulting with a local lawn care professional. Once the cause is identified, there are a variety of treatment options, such as applying fungicides, adjusting irrigation and mowing practices, or overseeding the affected areas. In some cases, it may be necessary to completely reseed or resod the lawn if the disease is severe.