By six in the morning in June, Flax Pond lies flat as glass and the neighborhoods around it smell like cut grass and wet pavement. Lopez Landscaping & Tree Service LLC is out in that hour, mowing, trimming and edging yards before the heat arrives and the streets fill. There is a rhythm to a city block of small lawns — gate, mow, line trim, blow the walk, latch the gate — and doing it well means the whole row reads as one continuous piece of green after the truck moves on. Spring and fall cleanups bookend the season, carrying off what winter and October leave behind. The best part of the day is looking back down the street and seeing every stripe line up.