The icy blue leaves are much less rigid than other yuccas making it a safer option near pathways or children. Though slow growing, beaked yucca will eventually develop a trunk and reach heights of 10' or more, so give it room. Mature specimens have a whimsical Dr. Seuss quality to them. Though many people prefer to prune up the lower leaves annually, there is really no reason to do so and may needlessly stress the plant. If you must trim it up, try to limit it to brown leaves.