The answer to 'hedge mud' is that it is a common issue caused by excessive moisture and soil compaction around hedges and shrubs. Symptoms include waterlogged soil, poor drainage, and unhealthy plant growth. To address hedge mud, the first step is to improve soil drainage by aerating the soil, adding organic matter, and installing drainage pipes if needed.
If the problem persists or the hedge is in poor health, it's best to consult a professional landscaper. They can diagnose the root cause and recommend the best solution, which may involve replacing the hedge or improving the landscape grading and drainage system.