The answer to 'mulch overgrown' is that overgrown mulch can be a common issue in landscaping, often caused by a buildup of decomposed organic material over time. Symptoms include a thick, matted layer of mulch that can prevent water and air from reaching the soil, leading to problems for plants and grass. The solution is to regularly maintain the mulch by removing the excess and replenishing with a fresh layer.
It's generally recommended to remove mulch when it exceeds 2-3 inches in depth. This can be done with a rake or a mulch fork, taking care not to damage any plants or roots. The excess mulch can then be composted or disposed of properly. After removing the overgrowth, you can apply a new 2-3 inch layer of fresh mulch to maintain a healthy, well-groomed appearance.