QuestionsHow to growTrees and ShrubsTrainingHow to treat yucca 0 Vote Up Vote Down John O\’Connor asked 16 years ago My Elephant Yucca has a large spine left after flowering. Should this be left as it is or what is best to do with it. 1 Answers 0 Vote Up Vote Down Gerry Daly Staff answered 7 years ago Cut away the entire flower spike as soon as the flowers fade.