Saturday morning on Mapleton Hill, the old silver maples throw long shade across lawns that have been mowed since the houses were new. Bennett's Lawn Services keeps those yards on a rhythm — cut, trim, edge, blow — moving quietly enough that the porch coffee is never interrupted. Under big trees the grass grows thin in patches and uneven elsewhere, so the deck comes up a notch in summer and aeration and overseeding go in once the nights turn cool. October fills the same yards to the ankles, and leaf removal there is a matter of coming back more than once. The reward is a small one and worth having: a green block of lawn with a clean line where it meets the brick walk.