I started all of my WNA seed in deep, large flats with really well drained soil mix in the early fall since I lived where the climate was ideal for doing that and never disturbed them until they were about to die from crowding. I did top dress with fresh soil mix in the winter when they were dormant. They need 2 months at 60F followed by 2 mos or more at 35F then they put up a leaf when it gets warm again. And I did crowd the seedlings, if not enough seed for the flat I divided the flat into 2 and put other seed in the other side. Lily babies really like crowding when they are young and it rains 9 month of the year. I used a bark based mix with lots of pumice since perlite can emit fluorine gas and burn some lilies when it gets hot. Yes they were very heavy. Perlite can be used with orientals and trumpets, probably OT's but not Asiatics and longiflorums so I did not use it on the natives or other species seeds.
