There is a bend of the Delaware at Pennsauken's Fish House shore where the river slows and the heat sits on the water all through July. Ryan's Green Thumb Landscaping works the blocks inland from it, where midsummer means grass that grows overnight and a mower that has to keep the appointment. Cutting, string trimming around every obstacle a yard can invent, edging the driveway line, and cleanups when the season turns — a short list, worked carefully. The pleasure is in the after: a lawn mowed in even passes, the border cut true, nothing left behind but the smell of it. Pennsauken summers are long, and a good lawn makes them look easy.