Q&As/Bulbs and Tubers/Caring for Lillies
Some of my lillies are distorted and deformed when they bloom. Do you know the reason for this please?
While lilies are not affected by many diseases, the few that can affect them are quite serious. It is possible your plant is infected with a virus that is carried by sucking insects such as aphids.
Symptoms are very much like what you describe, plants misshapen, sometimes dwarf in size and the plant can be bent over like a walking stick.
However, these same symptoms may also be caused by underground pests, and either too much or too little water. If you are unsure, do check with your local garden centre for more advice.
If it is a virus that has taken hold, you will need to remove the diseased plants and burn them to reduce the risk of the virus spreading to other lilies.