Lots of stores might call something an Aztec lily, but it might not even be a lily at all. You know how stores are, they'll name something just to sell it. You should probably post a picture so people will know what the plant is and can give you some decent advice. If folks are like me, I'm just sitting here with a degree in botany thinking I can't really help you because an Aztec lily could be most anything if it's Wal Mart or Home Depot doing the naming.