Q.The Leaves Of My Clivia Lily (growing In A Large Pot) Have Large Brown Patches. What Is Causing This And How Do I Encourage The P
lant to grow. The clivia survived winter outside, covered and in a sheltered spot. It now has one bloom but it is low down – not on a long stem.

Certified GKH Gardening Expert
Here's some info that may help:
https://www.gardeningknowhow.com/plant-problems/disease/plant-leaf-spots.htm
Also, a red flag went up when you said it was planted in a large pot. When repotting plants, they should only go up one or two sizes. If the container is too large, it causes too much moisture to be retained in the soil, essentially overwatering the plant. That could be what is going on here.