On summer mornings the fog sits low over the Hudson east of Plattekill and burns off by nine, leaving the slopes and back lawns steaming in the sun. Upstate Lawn & Landscaping, LLC is already working by then — mowing through the growing months, trimming close to beds and posts, edging drives and walks, opening yards up in spring and clearing the leaf fall once the ridge turns color. Hudson Valley lawns swing from soaked spring ground to a dry August, and the cut changes along with them. Leaving a property trimmed, tidy and open is a good way to finish an afternoon. That is the plain ambition here, one yard at a time.