Jo Ann and Caroline:
Here's some reading I thought you might like to review, especially the last paragraph:
http://www.bdlilies.com/ivehea...
I don't mean to scare anyone away from growing these by any means. Just be mindful of the fact that Tiger Lilies should always be planted in a separate garden and with proper precautions--and treated separately in all lily work, like deadheading, cleanup, etc.