First light crosses Hempstead Harbor and finds the lawns above Morgan Memorial Park while the water is still flat as poured glass. That early hour is when Mr. Rivas Landscaping gets moving — decks set low, grass still cool, a whole Glen Cove day of mowing ahead. The work runs the length of the season: cutting, string trimming, edging along walks and driveways, and the cleanups that carry a yard from thaw to bare branches. What the crew is after is the line — that clean shoulder where turf stops and bed begins, sharp enough to read from the sidewalk. Glen Cove is a harbor city of deep shade and small ambitious yards, and each one gets its own pass. By afternoon, when the breeze comes up off the water, the whole block looks looked-after.