Out in Cedarwood the commuter train goes by and for half a minute the whole block pauses — then the mowers pick back up in the long light of a summer evening. Vasquez Landscaping Services works that hour often: mowing, trimming, edging where grass meets asphalt, mulch in the beds, spring and fall cleanups bracketing the year. Waltham yards run narrow and sloped and full of odd corners, which is exactly where careful trimming earns its place. Grass cut even, walks blown clear, gate latched on the way out. Lawn care in Waltham, Watertown, Newton, Weston and Belmont.