Why should I mulch? A Why should I mulch? Mulching has an array of benefits. Mulch insulates roots in the winter, keeps roots cool in the summer, retains soil moisture, prevents weeds in the landscape, supplies nutritional benefits to the soil, and makes the landscape look great! Back to Top Share thist article: I want to purchase a gift certificate for tree work for a family member or friend. How do I get one? How do they work? Does pruning really provide any benefit to me or my tree?