The answer to 'how often to mulching' is that most experts recommend mulching 1-2 times per year, typically in the spring and fall. Mulch helps retain moisture in the soil, suppress weeds, and insulate plant roots from temperature extremes. A 2-4 inch layer of organic mulch like wood chips, shredded bark, or leaves should be applied around trees, shrubs, and garden beds.
Reapplying mulch annually or biannually is important to maintain the benefits. Over time, mulch will break down and need to be replenished. The exact timing and frequency may vary depending on your climate, plant types, and the type of mulch used. It's best to assess your landscape in the spring and fall to determine if a new layer of mulch is needed.