October turns Scarsdale into one long painted canopy, and underneath it the grass keeps growing right up to the first hard frost. Emerald Tree & Shrub Care Company takes the lawn end of that season — mowing while the leaves come down faster than anyone can rake them, clearing the beds, bringing the turf down for winter. Out where the woods lean close to the yards near the Weinberg Nature Center, the line between lawn and forest has to be drawn by hand every year. There is real pleasure in the last cut of the season: grass combed even, edges drawn tight, everything set to go quiet under the snow. Lawn care for Scarsdale and the towns just beyond it, from the first warm week to the last one.