I have obtained seedlings from Crocus vernus 'Michael's Purple'. It is about the same size as the typical species. Perhaps the big Dutch crocuses are polyploids and that's why they don't set seed? In my climatic region (Pacific Northwest), I find that fall-blooming crocuses are more likely to self-sow than spring-blooming ones. Jane McGary Portland, Oregon At 01:19 PM 3/21/2011, you wrote: >On 21 Mar 2011, at 18:59, John Grimshaw wrote: > > > A conspicuous exception is 'Yalta', a lovely selection by Janis > Ruksans that > > appears to be a hybrid betweem C. vernus and C. tommasinianus but > produces seed > > freely (though I haven't seen what its seedlings look like yet). > >A reminder two other hybrids of C. vernus and C. tommasinianus are in >cultivation, 'Haarlem Gem' and 'Vanguard'.