In Ballardvale a winter morning starts before the first train — headlights on the old mill dam, the Shawsheen loud under the bridge, and a plow blade coming down at the head of a driveway. Brouder & Sons Landscaping and Irrigation clears snow through those storms, then turns to mowing, edging and cleanups once the ground finally lets go in spring. There is a particular satisfaction in a driveway opened wide and squared off at the apron while the house behind it is still dark. The green months bring the other half of it: grass cut on schedule, borders kept honest, the yard put in order before a weekend. Two very different seasons, one town they know street by street.