My yucca has black spots on the leaves. What is it and how do I treat it?
Certified GKH Gardening Expert
It sounds like your yucca has a fungus. Treat the plant with fungicide. I like to use neem oil, as it is safe for people and pets and also will address any pest issues the plant may have. Here is more information on it: https://www.gardeningknowhow.com/plant-problems/pests/pesticides/neem-oil-uses.htm