Lilium longiflorum, or Easter lily bulbs can be planted outside after they finish blooming for Easter.  They will come back year after year, and bloom in early summer.  They don't naturally bloom at Easter;  they are forced.  The growers bring them out of dormancy in time to bloom around Easter.  You can do this with lots of bulbs:  Amaryllis is one that comes to mind, Paperwhite Narcissus too.  If you start watering the dormant bulbs at Thanksgiving, you'll have blooms mid-winter.  I'm guessing that lily bulbs take about the same amount of time to force.  Or just wait until they bloom naturally.

 

Easter lilies are in a group of lilies that bloom early and have fragrant, megaphone shaped flowers.  Plant them about 8-10 inches deep.  The plants get tall and heavy, so they need to be planted deeply, so they don't fall over.  They love their leaves and flowers in bright sunshine, but want their roots in cool soil.  You can also add lower growing perennials to shade the roots.  

 

When they start to leaf out in spring, the deer LOVE them.  So you need to put cages around them;  but it is so worth it when they bloom.  

 

Just check out Jim and Roxanne's lilies when they bloom.  Don't worry, I'll let you know when that is.  

 

HAPPY EASTER!!!