From the higher ground out toward Bear Hill, Milford in late May is about nine different greens at once, and telling them apart is half the trade. Shades of Green Landscaping Const. mows, trims and edges through all of it, with mulch in the beds and cleanups at either end of the growing year. Then the color drains out of the town and the same trucks go to work on snow — driveways plowed, walks cleared, sand across the icy pitch of an apron. The turn from one to the other happens fast in this town, usually overnight. Both halves come down to the same habit: showing up before it becomes a problem.