Putnam sits in the dark patch on the night map — the Last Green Valley, where the stars still come out properly on a July evening. Greenthumb Landscaping finishes its rounds into that long dusk: the last lawn mowed, the last edge trimmed, the machines cooling while fireflies start up over the cut grass. The work is weekly mowing, trimming and edging, fertilizing and seeding, and the spring and fall cleanups that bracket it. Grass smells best right after cutting on a warm evening, and a yard that's been kept all season shows it in the color. They serve Putnam and the towns around it.