The ice on Lake Cochituate gives out in pieces, and for a couple of weeks Natick smells like wet earth and thawing lawn at the same time. Greenleaf Landscaping meets both halves of that year. In winter the plows and shovels open driveways and paths around the lake neighborhoods, with salt worked into the low spots where meltwater keeps trying to turn back to glass. In the green months the crew mows, edges, mulches and hauls off what spring and autumn shake loose, keeping a property looking cared for week after week. There is a plain kind of pride in a lawn that never has an off month, and in a walk that is passable at six in the morning in February. Work carries from Natick into Framingham, Wayland, Sudbury and Wellesley.