Despite our complete neglect of this plant over the years, it still continues to come back. Deuterium (sorry, don't know the rest of it) is an annual, but it sows itself. We first got it from Kelly Lowe years ago, when she was moving out of her apartment (I remember her just yanking it out in summer and shoving it in the ground - I think they like that). Anyway . . .
Nice huge plant that takes over the yard, grows in the shade, huge flowers, very fragrant, blooms only at night - so perfect for a moon garden.