Why Are The Leaves Of My Cranium Lilies Brown And The New Ones Are Reddish Brown
The whole plant is spotted.
Certified GKH Gardening Expert
Unfortunately, your photo did not come through.
This sounds like it could be an infection. Usually, this can be dealt with, in container, with a fungicide.
This article will help: https://www.gardeningknowhow.com/garden-how-to/info/using-fungicides-in-garden.htm
Here is an article that will help you to care for Crinum Lilies: https://www.gardeningknowhow.com/ornamental/bulbs/crinum-lily/crinum-lilies.htm