I agree with Diana Chapman that Erythronium multiscapoideum is very easy to grow, including in pots. There is a form that was known as "Cliftonii" ( not a valid taxon) that has unusually large flowers. Around Portland, Oregon, once E. revolutum is in a garden it usually self-sows. The seeds are dispersed by ants (as are seeds of many other western American species). Perhaps it germinates best if planted fresh. In nature it grows in moist places. I leave my seed pots exposed to outdoor temperatures, at least the kinds that I plant in fall, but covered from the rain. I've raised many erythroniums from seed. Jane McGary Portland, Oregon, USA At 06:22 AM 3/28/2013, you wrote: >Richard: > >I have found that seed that is more than a year old is very difficult to >germinate. I germinate all my seed in the refrigerator, putting it in >vermiculite in plastic bags and leaving it there until I see signs of >germination, usually about three months. The easiest Erythronium for me >is E. multiscapoideum. It seems to tolerate a wider range of growing >conditions, and is more tolerant of warmer weather than the others. It >grows in regions that have blistering summers, but it does grow deep, >and it is also the first one to emerge, way ahead of E. oregonum and E. >revolutum. E. revolutum has been the most difficult for me, even >though it grows locally (or so I am told, I have never found any!). >Lilium kelloggii grows locally too, and I can't grow that either. I >don't think any of these do well in pots. I have had raised beds made >for them, and they are doing well in them. > >Diana >Telos Rare Bulbs >http://www.telosrarebulbs.com/