Up in the Merryall hills the stone walls run straight through woods where fields used to be, and the lawns that back onto them hold the last green of the year longest. Greenstone Property Maintenance, LLC tends New Milford properties through that turn of the calendar — mowing and trimming while the grass still climbs, then edging, leaf removal and the fall cleanup that puts a yard to bed. Hill lawns come with slope, ledge and shade, and each one asks for a different line up the bank. Done right, October leaves a place squared away: beds cleared, borders defined, the wall line visible again. It is plain work, and it shows.