The species I mentioned were largely without snow in the relevant two hard winters when temperatures were between minus 15 and minus 18 C for many nights. Peter (UK) On 3 March 2014 22:12, Ellen Hornig <hornig@oswego.edu> wrote: > Indeed, Ellen has since remembered a few more species that did well in the > snow belt: K. triangularis, K. baurii, K. typhoides, K. stricta. As far as > I know, snow is pretty much an unmitigated blessing for perennials over the > course of the winter. >