The final Medford Farmers Market of the season will feature live music by Night Gardeners from 3 to 5 p.m., and Trampled by Oompah from 5 to 6:30 p.m. Night Gardeners is Billy Lazzaro on guitar and vocals, and Gemma Smith-Vondras on vocals, fiddle, and keys. They are two gardeners, Italian Americans, Boston-area natives and besties who love making music together. Trampled by Oompah combines Polka and all the fun of a German Octoberfest with summer festival jams. Visit the Farmers Market website for the list of this week’s vendors, artisans, and other activities.