Why Are Leaves On My Yucca Plant Turning Black
My yucca plant leaves were turning black by the hand fulls. I pull them off and then a few days later there is more as well as sections of the trunk was turning black. I always put in house during winter, then back on porch in spring. When this happened it was in house.
Certified GKH Gardening Expert
This sounds, either, fungal or bacterial! Unfortunately, your photo did not come through so I cannot identify the issue.
This is caused by overwatering, most commonly. You will have to make sure to let these dry out, very thoroughly, between waterings. I would recommend treating with a fungicide, also.
This article will help: https://www.gardeningknowhow.com/garden-how-to/info/using-fungicides-in-garden.htm
This article will help you to care for yucca in container: