The answer to 'why is my sod disease' is that sod can be affected by various fungal diseases, often caused by improper watering, mowing, or soil conditions. Common symptoms include discolored, wilting, or patchy grass. To diagnose and treat the issue, you'll need to closely inspect the sod and soil for signs of disease.
If the problem is caught early, some sod diseases can be treated with fungicides or by adjusting your lawn care routine. However, severe or persistent issues may require professional treatment or complete sod replacement. It's best to consult a local landscaping expert to properly identify and resolve the problem.