The answer to 'mulch schedule' is that most experts recommend applying a fresh layer of mulch to your landscaping beds once or twice per year, typically in the spring and/or fall. Mulch helps retain moisture, suppress weeds, and insulate plant roots from temperature extremes. The ideal depth for mulch is 2-4 inches, though you should avoid piling it directly against the trunks of trees and shrubs.
Maintaining a consistent mulch schedule is important for the health and appearance of your landscaping. Replenishing mulch as it decomposes over time helps keep your beds looking neat and tidy while also providing ongoing benefits to your plants.