The High Line Canal threads its slow, unhurried way past this side of Columbine, cottonwoods leaning over the gravel path and shade pooling on the lawns beyond the fence. Urban Flow Landscape & Design tends those lawns: the regular mow, sharp edges along drives and sidewalks, string trimming everywhere a deck cannot reach. In a place where every green blade depends on water that traveled a long way to get here, feeding, weed control and sensible mowing height are how a yard earns what it drinks. Aeration breaks up the clay so nothing runs off wasted, and cleanups bookend the growing season. Walk the canal on an August evening and you can pick out, without trying, the lawns that get looked after.