On French Hill the houses stand close together and the lawns come in small squares, which makes every edge count. Devin's Landscaping LLC mows those city yards and the wider ones out past the hill — trimming tight along fences and foundations, edging sidewalks back to a straight seam, sweeping the clippings off the concrete before pulling away. Spring means clearing winter's sand and street grit out of the grass; autumn means staying ahead of leaves that drift into every corner of a tight lot. The routes run across Nashua and into Hudson, Merrimack and Litchfield. Small yards, cut sharp, add up to a better-looking street.