The answer to 'why is my patio mud' is that your patio is likely not properly draining, causing water to pool and create a muddy surface. This can happen due to poor grading, compacted soil, or clogged drainage systems.
Some common causes of a muddy patio include heavy rainfall, irrigation system issues, or a high water table in your area. Over time, the soil can become compacted, preventing proper drainage and leading to standing water. Clogged or damaged drains can also contribute to the problem.