I have planted several lily of the valley about 3 years ago. The leaves come up, but never a flower. It is in the shade with just a little bit of morning sun. Also I have a bed of bearded Iris that is several years old. It doesn't seem to be overcrowed, and I have allowed the backs of the rhizomes to show throw the soil. They are in full sun. I fertilized early in spring with miracle grow granules slow release fertilizers throughout the entire garden. It bloomed very well the first two years, but last year and this year just a few. They do not seem diseased or have any insects. Any ideas? I am in coastal humid and hot, North carolina. Thanks everybody for your help. mudbug.