Q.Yellowing clivia leaves
My clivia plant, which I have had for several years, has five magnificent, enormous flower heads but the leaves are yellow and brown and look very poorly indeed.
This could be a few different issues, so this could help me to identify the issue and give you the best care option. Do you fertilize every year? Did the plant change color all at once, or did this happen over time? What are the watering habits? I will be more than glad to help you narrow down the possibilities of what is going on here, I just need a little more information to give you the best answer.
https://www.gardeningknowhow.com/ornamental/flowers/clivia/clivia-plant.htm