The answer to 'how to maintain mulch' is to regularly replenish and refresh the mulch in your landscaping. Spread 2-4 inches of fresh mulch around plants, trees, and shrubs to help retain moisture, suppress weeds, and improve the overall appearance of your yard. Be sure to avoid piling mulch directly against the stems or trunks of plants, which can lead to rot and disease.
Mulch should be refreshed 1-2 times per year, typically in the spring and fall. Over time, mulch will break down and need to be replaced. Monitor the depth and coverage, adding more as needed to maintain the recommended 2-4 inch layer. Proper mulch maintenance is an important part of keeping your landscaping healthy and looking its best.