Fog lifts off the North River on June mornings and lingers in the low yards off Bridge Street until the sun burns it clear. Green Crew Landscaping works Norwell lawns through all of that — weekly mowing, trimming, crisp edging along beds and driveways, and the cleanups that open and close the season. Salt air and sandy South Shore ground make for grass that wants attention rather than neglect, and it tells on you quickly either way. A straight edge along a Norwell walkway is a small thing that changes how an entire property reads. The routes run through Norwell and on into Hanover, Scituate and Marshfield.