Have been letting this monster grow in a corner of our community garden plot because I can't decide whether or not it might be a worthwhile volunteer, as we've had some cool ones in the past. Leaf size as per my wife's foot in photo #2. Flowers are light purple, trumpet-shaped, ca. 3 inches. Spiky fruit/seeds are just starting to form (7/20, Chicago). Guidance welcome!
SOLVED: Weed or volunteer vegetable?