Out past the airfield the Assabet refuge holds a few thousand acres of wet woods, and the fog that sits there on September mornings drifts across the yards on the roads nearby. Ronaldo's Landscaping starts in it — mower deck already wet, the first cut of the day made before the sun burns the field clear. The warm-season list is long: weekly mowing, string trimming, mulch, cleanups in spring and fall, leaves hauled off ahead of the first hard freeze. When that freeze arrives the trucks change over to plowing and shoveling, and a good night is measured by every driveway open before daylight. Stow, Maynard, Acton and the towns along Route 62.