Spring turns over fast in the Thumb: one week the fields are brown corduroy, the next the whole county has gone green at once. Ace Landscaping LLC mows, trims and edges yards around Sandusky, the Sanilac county seat, where the courthouse block sets the mark for what a kept lawn ought to look like. There is real satisfaction in a first cut of the year — stripes laid straight down a side yard, a crisp edge along the walk, clippings swept off the concrete before the truck pulls away. Spring cleanups clear what winter left behind, and fall cleanups handle what October brings down. Sandusky and the towns around it get a little tidier one yard at a time.