Late April along the road into Cold Spring Harbor is all dogwood and new leaf, the woods still open enough to catch water glinting through them. Jose Veliz Landscaping & Tree Service Inc. opens its season there, waking yards up with cleanups, first cuts and edges re-established after the winter. Summer keeps its own beat — mowing, trimming, walks blown clear, week in and week out. Autumn is leaves, and on wooded lots there are a great many of them, which means several passes rather than one heroic day. It is honest outdoor work, and a swept, level lawn is the proof of it.