Out along the Bloomfield line the Third River threads through Watsessing Park, and the thaw reaches that low ground before it reaches anywhere else nearby. K&B Landscaping LLC starts its year about then, with a spring cleanup that strips out sodden leaves and broken limbs, followed by the first mow once the turf can carry a machine. From there it becomes the steady business of the season: cutting on schedule, keeping the margins tight, holding the beds open. Autumn runs the whole thing in reverse, leaf by leaf, until a yard is put away for the cold. Watching a lawn climb back from brown to full green never quite stops being satisfying.