By now you have heard of the many benefits of mulch. It keeps down the weeds, keeps roots warm, and looks as pretty as the flowers it protects. South Carolinian gardeners swear by the stuff. Questions still crop up about mulch despite its ubiquity, especially around autumn. Is it time to put on a layer or should you wait? How often should you touch up your mulch? There are few real rules to guide you in your decision to replenish your mulch, but there are some conditions that might lead you to want some more mulch in your yard.