South Brookline still keeps a wild pocket or two — the boardwalk out to Lost Pond, the marsh at the Hoar Sanctuary, red maples standing in black water. Thoreau Landscape Company tends the lawns nearby, mowing, trimming and clearing the yards that back up against all that quiet. Grass grown at the edge of woods lives a different life: more shade, more moss, and more November leaves than any single rake was built for. Handling that well means reading a yard rather than simply passing over it. The result is a lawn that sits easily against the trees instead of arguing with them.