Fresh mulch is the fastest way to make a property look cared for. It also does real work: it holds moisture in the soil through dry summer weeks, keeps weeds down, protects roots from temperature swings and breaks down slowly into organic matter that feeds the soil. Done wrong, though, it can smother plants and rot tree bark.
We mulch at 2 to 3 inches, which is deep enough to block weeds and hold moisture but not so deep that water and air cannot reach the roots. We pull mulch back from tree trunks and keep it below siding and away from the foundation, instead of piling it high in the volcano shape you see around so many trees.
Most homeowners mulch in spring, after cleanup and before the summer heat. Fall mulching is also a good choice in New England: it insulates roots before winter and gives the property a clean look through the cold months. For builders, a fresh mulch job is one of the finishing touches that helps a new house show well at closing.