In the 17th century, Versailles’ Potager du Roi, or “King’s vegetable garden,” was the French palace’s primary source of fresh fruit and vegetables. Today, it’s managed by horticultural scholar Antoine Jacobsohn, who runs the site as an ongoing experiment in sustainable gardening. In a talk, Jacobsohn touches on the history of the potager and his efforts to garden with, not against, nature. A reception will follow. Martinos Auditorium, Granoff Center for the Creative Arts, 154 Angell Street.