Salt Creek runs high and brown through Addison in the thaw, and everything green in town takes its cue from that water. De Simone Landscaping Inc works the long green stretch of the year with mowing, trimming, edging and the upkeep that keeps a yard even from April to the first hard frost. Then the calendar turns and the same trucks go out for snow, opening drives and lots, clearing walks, spreading salt against the ice that shows up behind every thaw. Winter here rarely announces itself; it arrives overnight on a clipper out of the northwest, and the work starts before the light does. Both halves come down to the same habit, which is showing up while the ground is still deciding what it wants to be.