When and how should I lift and move/divide my Foxtail Lilies (the Latin escapes me...E----something?.)? I noticed that from the 3 bulbs I planted several years ago, I now have a clump of smaller plants and only 2 small flower stalks this year. I LOVE these plants and I'd like to have more, but I'm completely unfamiliar with how to propagate them. Anyone have experience with this?