Sprekelia formosissima wintered outside against a wall here for years. However, plants dug and stored dry for the winter bloomed much more reliably. I doubt that the ground ever froze much near that wall – almost any herbaceous plant which does not grow actively during the winter will survive there. What is the Hippeastrum parent of the nothogenus ×Hippeastrelia? Jim McKenney jimmckenney@jimmckenney.com Montgomery County, Maryland, USA, USDA zone 7 where a fat package of seeds from Ron Ratko has me counting my chickens... My Virtual Maryland Garden http://www.jimmckenney.com/ Webmaster Potomac Valley Chapter, NARGS Editor PVC Bulletin http://www.pvcnargs.org/ Webmaster Potomac Lily Society http://www.potomaclilysociety.org/