Lilies are bulbous plants that like tulips and daffodils bloom for a set period and then that is it until next year - the flower buds they have when the stems come out of the ground in spring are the only ones they are going to open that same year.

I have the same issue. I bought several different color asiatic lilies from a big box store three years ago and planted them several feet apart.the were all bloomed when I bought them and out of 12 of them only 3 have ever bloomed since. One of them actually falls over every year before it's fully grown. They get plenty of sun and water. This year one of them produced bulbs on the stems after the flowers disappeared. How do I get all the others to flower?