Posted: 06/04/2014 at 21:10
I did not used to be able to grow them, but I loved them so much, because of many Scottish holidays, that I kept trying.
Verdun is right; cool, semi-shade, moist conditions preferred and leaf mold seems to have helped.
They are not long lived so I sow seed each year, in the autumn, in an unheated greenhouse, the winter cold seems to help them germinate. Last years seeds have just germinated and should flower next year. Most of the existing plants seemed to have started growing, so my collection is increaing. Sorry does that sound like I am bragging, if not then I am.