We planted a yukka in the front garden of our old house and one year were "blessed" with a flower - if you can call it that. This thing just grew and grew and developed a personality of it's own. We called her Audrey (from the "Little Shop of Horrors"). Mothers would call their children back as they walked past the garden to stand, staring open-mouthed and pointing. When I finally cut her down - with a saw, I might add as she was so thick I measured her at 12feet high.