The first warm Saturday announces itself in Cherry Hill with forsythia going off yellow along Chapel Avenue and a mower starting up somewhere one street over. HUY GUY Lawn & Landscape opens the season on those mornings, when the ground has finally dried enough to hold a wheel and everything is impatient to grow. From then until the leaves turn it's a weekly circuit: cutting, trimming, edging, tidying the strip along the sidewalk where grass always wants to creep. A good cut here is quiet work — you notice it mostly as a straight line and an even color, front yard to back fence. That's the whole aim, on block after block of this town.