Boxwoods are best planted in loamy soil in a full-sun to part-shade location, preferably in an area somewhat sheltered from winds. Their roots are shallow, so the soil must be protected from the heat. Maintain a layer of organic garden mulch, 3 inches thick, around each plant. Start mulching 2 inches out from the trunk—as a general rule, it is bad to mulch right up against the trunk of a bush or tree, because it invites pests and diseases—and work your way about one foot outwards, around the whole circumference, space permitting