Savanna wakes in the shadow of its bluffs — the sun has to climb over limestone before it reaches the yards above the Mississippi. DNS Lawn N' Wash Services is generally rolling by then, mowing, trimming and edging while the grass still holds the night's damp. River-town lots run narrow and long here, which puts a premium on a clean edge and a tidy finish at the back fence. Come fall the hardwoods on the ridge let go nearly all at once, and cleanups take over the schedule. Savanna work, and the nearby towns get the same treatment.