Posted: 26/04/2013 at 14:43
this is the place to find EVERYTHING. But I do agree with welshonion.
I don't think they can be difficult to germinate or they wouldn't be spreading around my garden so quickly. But maybe those little corms get in with other weeds and taken to the compost heap. I assume that as time goes on all those fancy bronze and variegated ones seed back to the original. They aren't a trouble to me but if I was a neat and tidy gardener or an alpine enthusiast the ywould be a pain.