Ornamental sweet potatoes, grown for their colorful leaves as an annual groundcover or container plant, do produce tuberous roots but they are generally of poor quality for eating. A few new ...
I have seen poinsettias growing outdoors as far north as Granada Hills but they were always planted against a wall.
You can, of course, plant potatoes deeper in the ground but this ... that develops into a five-foot-tall shrub with highly ornamental flowers. No, you will not see black and red Twizzlers hanging ...