Late August along Grand Avenue, the light goes long and gold around six and lies flat across the lawns. Josealas Landscaping Corp. often works that hour, when the day has let go of its heat and a mown yard holds the light like an open field. Weekly mowing and trimming, beds edged and mulched dark against the grass, shrubs kept in their shape. In fall the work turns to hauling leaves off; in spring it turns to waking the beds back up. The yards stay tended one visit at a time, right down the block.