The lifespan of mulch depends on several factors, including climate and mulch type. Typically, mulch lasts between one to four years before requiring replacement. Regular inspections of your mulch’s condition can help determine whether it needs replacement or refreshing. If the mulch is compacted or waterlogged, it may require rejuvenation, and if weed growth or other problems arise, it is advisable to replace the mulch. Regular upkeep and maintenance can help prolong the lifespan of your mulch and keep your garden healthy.