On the coldest mornings around Byron the river throws fog, the plume off the towers north of town stands straight up in still air, and the whole valley looks like it is holding its breath. Dietrich Lawn Care is already moving by then — blade down on the drives, walks shoveled and salted, lots opened before anyone needs them. The warm months put the same trucks on mowing, trimming and edging, with cleanups to open and close the year. Grass grows hard in this valley once June arrives, and it takes a weekly cut to keep it honest. Either season, the work shows up the same way: a property that is clear and squared off.