In Black Brook the morning comes up the Ausable branches first, river fog lifting off the water while the dooryards are still silver with dew. Blackrock Landscape Corp. keeps lawns in this Adirondack corner of Clinton County — mowing, trimming, edging, mulch, and the spring and fall cleanups that bracket a short northern growing season. Grass here has to be coaxed rather than chased: it comes on fast in June and quits early, and much of the skill is reading which weeks it will give you. There is a plain satisfaction in a clean edge along a gravel drive with Silver Lake Mountain standing behind it. From Au Sable Forks out toward Taylor Pond, the aim is a yard that looks cared for without looking fussed over.