Yucca plants bloom in the spring, and then die back. The stalks remain behind and new growth sprouts nearby. The leaves at the base of the stalk are sharp and spiky. They are a protected plant in California. Every year, I love seeing the hillsides dotted with their tall flower stalks – often they are 7 – 10 feet tall. In a land of low scrub, it is a pleasant break to the eye.