By June the Commonwealth Avenue Mall is a green tunnel, and the city's dooryards try hard to keep up. Boston Landscaping Services handles the lawn side of that ambition: regular mowing, hand trimming where a machine cannot reach, edging along brick and bluestone, and the spring and fall cleanups that reset a property. City soil is compacted and shaded and asks for patience — feeding and overseeding rather than miracles. The measure of a good week is a lawn that reads even from the sidewalk and feels soft underfoot at the back gate. In a place built mostly of brick, the green parts count double.