Littleton keeps its orchards up on the hills and its water in the low places — Long Lake, Nagog, the ponds holding whatever light is left at the end of a day. Luna Landscaping Inc cuts and trims through that country, working yards set between apple rows and stone-walled fields. May here smells like blossom and fresh clippings at the same time, which is about as good as a workday gets. The aim stays plain: an even cut, clean borders, a lawn that reads as finished the moment you turn in the driveway. When the leaves come down over the drumlin roads in October, the cleanups carry them off.