Fog sits on the Bolton Flats most summer mornings, lifting off the Nashua River meadows an hour or so after sunrise. Pereira Landscaping starts in that cool — mowing while the dew is still down, trimming fence lines and mailbox posts, edging where the turf keeps trying to creep over the walk. Cleanups come around twice a year and take a yard back to bare ground, in April and again in November. By noon the mist is long gone and the lawn stands up level and clean. Lawn care in Bolton and the surrounding towns.