Joshua, your lilium seeds stay good for many years in the freezer. I think it was Ed McRae who bragged of starting seed that was frozen for 40 years! The oldest seed I have germinated was 12 years in the freezer.
The caveat is the freezer must not be the frost-free type. A small chest type that requires occasional defrosting is fairly inexpensive.
Right now I have a lot of frozen species seeds that I have acquired over the years that I'm sure I'll "get around to" one of these days.
I'm really putting this out for everyone here as seed storage hasn't been discussed recently.
