Late August in the Saginaw Valley is sugar beets to the horizon, sky in every direction, and heat shimmering off M-52. St. Charles Lawncare LLC works the yards set inside all that farmland — mowing, trimming along fences and foundations, and running the edger down the drive so the pavement stands apart from the grass. Level ground and deep valley soil grow a heavy lawn, and it wants cutting on a rhythm rather than a whim. The year opens with a rake and closes with a truckload of leaves. Kept that way, a lawn holds its color right up to the first hard frost.