If you search this forum for bulbils, you can find some info. There was a thread that recommended planting at a depth of one inch outside.

I'm interested in the topic too and what I'd like to know is, at what point should I harvest the bulbils from the stem? Will they just fall off in my hand, or do they need to be cut off?

I have found a site that has the info at Lilies.org. I am a newbie. I look forward to sharing these, (giving away actually), with others this fall on the seed swap forum.