> >But now, I think you meant: as a result of some unknown environmental >trigger, many different Colchicum species germinate, no matter how >many years they've been buried in their seedpots. Diane, I find this with Trillium germination...... last year I had seed sown 2, 3, and 4 years before all germinate, or at least in sufficient numbers to notice that there were lots of seedlings simultaneously in lots of pots. I have found that some Colchicum (rhodopaeum for example) have germinated easily (or conditions were just right) while others just sit and wait. Cheers. Paul T. Canberra, Australia - USDA Zone Equivalent approx. 8/9 Growing an eclectic collection of plants from all over the world including Aroids, Crocus, Cyclamen, Erythroniums, Fritillarias, Galanthus, Irises, Trilliums (to name but a few) and just about anything else that doesn't move!!