Every year about Easter you see those pretty "Oriental lilies" in the stores. I've been given more than one, and they fail every time. I've tried planting outside and I've tried growing in pots; I've tried sun and shade. Is there a secret to keeping them alive in central Florida or is it just not possible? They don't pop up again the following year or two once they fail, so it appears that it's not a case of dormancy. There doesn't appear to be any disease or pest problem. Thank you.