Down where the Hudson flattens toward Mechanicville and Halfmoon, river fog sits on the grass most summer mornings until the sun burns it off around eight. Northeast Property Maintenance is usually already working by then — mowing, string-trimming, edging along drives and walks, clearing whatever the cut leaves behind. The season opens with a cleanup that takes away winter's grit and broken branches, and closes with leaves, load after load. In between it is rhythm: same day, same route, grass held at an even height. Saratoga Springs and the towns south of it green up hard in June, and keeping pace with that is most of the craft.