(Formerly sold as L. spec. from Tibet, 4700m) Amazingly tough! You'd think growing at an altitude of 14,000 feet they wouldn't take temps in the 100s, but they did just fine. Bears typical Edelweiss flowers, although not very numerous, grow this one for the unusual silvery-fuzzy foliage and toughness. BEFORE ORDERING, PLEASE read very important information about growing Edelweiss on top of the Edelweiss main page.