Down at New Hamburg the Hudson goes gray-blue at dusk and the train whistle carries all the way back up into Wappingers Falls on a still night. Lehigh Lawns and Landscaping, Inc. works that stretch of river town in both directions of the year — mowing, trimming, mulch and cleanups while the green is in, plowing and salting when it isn't. River air keeps lawns going late and then delivers a clinging, waterlogged snow that has to be moved before it sets up. Scheduling here follows what the weather actually does rather than what the calendar says it should. The result is a property that never looks caught off guard.