Replying to Jim Shields' comments: N. fernandesii has slowly built up steam over 20 years from seed ( Monocot Seeds), mostly in the ground in a 15F entryway but also well enough in pots in the 30F sunhouse. Growing medium is my local moderately acid soil. Attempts outside didn't work. Seed was set once, germinated, then died. The scent repays all efforts at growing. N. rupicola does well here, though probably better in a richer situation than the rock garden. It self-sow, though not in abandon. Jim Jones Lexington, MA