September mornings on Salisbury Street begin with dew heavy enough to see, and the grass at Institute Park takes the low sun sideways. The Turf Manager is a lawn outfit through and through — mowing, edging, trimming, and the autumn cleanup that sets a yard up for the cold. Worcester turf works hard for its color; the soil sits thin over ledge in some yards and holds water in others, and the lawn will tell you which one you have. Cutting at the right height once the nights cool is half the labor and nearly all of the difference. By the time frost reaches the hills, the lines are straight and the beds are clear.