The Northern Canal walkway is a fine place to watch the year turn — late-summer water sliding past the Francis Gate, and then, a few months on, the whole channel rimmed in ice. Wilquin Landscaping keeps pace with that swing: mowing, trimming and edging while the grass is growing, mulch in the beds, hedges shaped, cleanups at either end of the season. When the storms arrive the tools change over — driveways plowed, walkways and stairs cleared, salt down where the ice sets. Nothing about a year in this city is subtle, and the work follows it exactly. Ground that is cared for in every month Lowell can hand out.