By the middle of May the flat streets off Nash Road smell like nothing but cut grass, every afternoon, all the way down the block. Ledo's Lawn Care is part of that chorus — weekly mowing, trimming around posts and fences, edging the drive, then a clean sweep of the walk when the mower shuts off. Spring opens with a cleanup that gets winter out of the corners; autumn closes with the leaves gathered before they mat down over the crowns. Nothing complicated, done on time, on the same day, for New Bedford yards that have come to expect it. A lawn kept up is a house that looks lived in on purpose.