Hi I have not thought of this plant being bulbous before, but it is one of my many plants that I have not closely acquainted myself with below the ground, yet. B. yuccoides is described as polycarpic, as distinct from monocarpic. Can I assume B. septentrionalis is the same. My present plant is a 4-5' diameter rosette with a stake through its heart, where the first flower stem was frosted off at around 2.5'. Am I going to get the existing rosette reshooting from the centre, or is it only polycarpic in the sense that this rosette stays green while new shoots form round the side? Brian Whyer, Buckinghamshire, England, zone ~8