Rockville's brick mills sit in the low ground of Vernon, and the streets climbing away from them are narrow, steep, and stacked with small hard-working yards. Carone and Sons Landscaping LLC has spent its working life on that kind of property. In season the mowers go up the hill and come back down leaving straight lines and a crisp border along every walk and drive. In winter those same lots need a plow that can turn in tight quarters and a shovel for the steps no machine will ever reach. Vernon is a town built on doing careful work in a small space, and this is that — in grass, and in snow.