I have had 2 batches of A. cyllenea, fresh from Forum members. First batch 1 germinated, died as soon as I potted it on. Second batch, 5 germinated and on the donor's advice, left them, for a second year in the seed pot. Potted on OK but died during the following winter, not cold but perhaps too wet.
A. vernalis won't germinate for me, even fresh and A amurensis has never set seed on my plants. I think all plants in NZ are divisions from a single clone, along with a double form which is sterile anyway.