>>>>The data bases seem to be all over the place when it comes to species lily germination. And of course I do not know what I have.
You couldn't have stated you dilemma more succinctly.
If the company didn't warn that some may not come up until the following spring, my inclination is that the mix is all (or mostly all) the relatively quick germinating, immediate epigeal type species, and pretreatment wouldn't be necessary (but won't hurt, either).
Your coarse of action is logical. The only thing I might add now is to put the sown seeds in some insulation, so when you open the garage door at say, -20C, they aren't flash cooled to a temp lower than they can tolerate. Maybe a box filled with crumpled newspaper or styro peanuts, or a styrofoam cooler.
The first time I grew species lilies from seed, I was more clueless than you, Carol. Didn't even know about hypogeal germination. But I never toss out seeded pots after just one season if nothing comes up. Among them were my first martagons from seed, and I still have them.
