The answer to 'why is my lawn mud' is that your lawn is likely experiencing poor drainage, soil compaction, or excessive moisture. Muddy lawns can be caused by a variety of factors, including heavy rainfall, improper irrigation, soil type, and lawn traffic.
Common symptoms of a muddy lawn include standing water, squishy or soft ground, and difficulty walking on the grass. To solve this issue, you'll need to address the underlying cause. This may involve aerating the soil, improving drainage, or adjusting your watering schedule. In some cases, you may need to reseed or resod the affected areas.