I have had success with most so far, leaving them in an unheated greenhouse over winter. The one I'm a bit wary of is D. binata var. multifida f. extrema! Is it truely UK winter hardy? Will it survive in my unheated GH? Will it benefit from a winter dormancy?
Last year it died back from a cold shock, so I brought it indoors, and it grew back beautifully, if not a bit spindly!
Edited by Loakesy, 24 September 2007 - 11:21 AM.