There is a week in April when the Bartlet Mall turns green all at once and the Frog Pond hands the whole sky back to you — that is when the mowers come out. Eastwood Cleaning & Lawn Service LLC runs Newburyport's growing season in a straight line: cutting on a rhythm, edges drawn crisp along brick and granite, spring and fall cleanups hauling off whatever the elms and maples let go. Then the calendar turns, the wind swings northeast, and the same trucks come back with plows on the front. Driveways opened wide, walks shoveled, a path from street to door that stays usable while it is still coming down. Two seasons, one small city, and a yard that looks looked-after in both.