Rain moves across the horse fields near Beekman Lane in late spring and leaves pasture and lawn alike a shade brighter. SurelyGreen Landscaping LLC works those weeks hard, because grass after rain grows overnight — mowing on the week, trimming close along fence posts, edging where lawn meets stone and asphalt. Beds get mulched, borders get defined, and the seasonal cleanups clear out whatever winter and wind left in the hedges. A cut lawn drying in the sun with its lines still showing is a plain, good sight. Hillsborough offers plenty of chances to see one.