I have two yucca plants that look really “yucky”. This is the fourth year that I have had them and they have become so big. The leaves (or stems) have brownish or rust colored areas on them and some are a yellowish green and brown. Some of the leaves pull off easily and I have removed them but the other ones don’t pull off easily. I’m wondering if I can cut this way back or how I remove all the bad leaves, which is most of them. They have become so long that they are covering up some of my other plants. Am I doing something wrong that the leaves are looking like this? Last year they both produced their first flower. What do I do with the big, thick stalk that is left? Any help would be greatly appreciated. I’m about to pull them up out of the ground! Thanks!