Late June in Lebanon, and the Upper Valley goes thick and green overnight — grass along the Mascoma puts on an inch while you sleep, and the slopes above Colburn Park hum with growing. LaHaye Property Maintenance keeps lawns here on an even keel, mowing, trimming and edging week after week so a yard reads clean from the street and clean from the porch. There is a plain pleasure in the finished pass: stripes laid straight across a sloping Upper Valley lot, a sharp line where turf meets granite walk, the clippings gone and the whole place suddenly looking tended. From the mill-town blocks down near the river out to the wooded lots toward Enfield and Plainfield, it is simple work that shows — a lawn that holds its shape right up to the first hard frost.