The answer to 'why is my grass disease' is that there are several common causes of grass disease, including fungal infections, bacterial infections, and environmental stressors. The most common symptoms of grass disease include discoloration, thinning, and patchy growth.
Some of the most common causes of grass disease include overwatering, poor drainage, excessive thatch buildup, and nutrient deficiencies. Fungal diseases like brown patch, dollar spot, and pythium blight can also lead to grass disease. In some cases, environmental factors like drought, heat, or cold can weaken the grass and make it more susceptible to disease.