Dear all, Living in zone 8-9, I am o refrence on hardiness. But I resow many of the cultivars/species with varying results: Alberto Castillo: mostly true (with some interesting light bleu forms) Chorlotte Bishop: only 25% is pink Froyle Mill: 90% true Rolf Fiedler: 100% true and also multiply rapidly by stolons. Jim in sandy soil it is potentially "weedy" worth a try in colder climates. Greetings Lauw de Jager http://www.bulbargence.com/ South of France (zone 8 Olivier) > One recollection was that I never knew of any self sewing in > colder climates. I assume these are akin to 'Wisley Blue' or typical > unflorum. I wonder if this is the result of multiple clones to start > with? Are commercial stocks all propagated clonally? > Do I need seedlings to encourage its weediness?