When lilies die do they come back?
You should deadhead blooms and cut back stems as the lilies bloom during the growing season, and again let the foliage die back, but once it has died back in the fall, it can be cut off at this point.
Can lilies survive frost?
Frost Damage on Lilies
It is not common for lilies to experience significant damage from frosts or freezes, as they are very hardy and resilient. If an unusually cold night is forecast for the late spring, this may be an issue for sensitive new leaf growth.