Shippan Point juts into Long Island Sound below downtown Stamford, and on an early-June Saturday the shoreline is bright, sails are out past the harbor and every lawn on the peninsula is in full, fast growth. Gerbert and Sons Landscaping does lawn care in Stamford, a city whose yards range from breezy waterfront grounds to tight lots in the shadow of the office towers. Grass by the water takes salt and wind; grass in town takes heat thrown off the pavement; both need regular mowing and trimming to look their part. June growth is relentless, and staying ahead of it is the craft. On a morning like this, with the scent of cut grass drifting over the boats, a well-kept Stamford lawn is a pleasure all its own.