Posted: 18/02/2015 at 19:16
Italiophile is right, I used to grow 'fartichokes' and tried really hard to ensure that I removed all of the tubers, but was still getting volunteers about 8 years after I 'stopped' growing them! By pulling the new shoots up whenever I saw one, they did eventually give up though. Personally I like them roasted but that didn't help at all with their 'sheet-lifting' properties!
Bekkie - you will likely get between 10 and 25 tubers from each one planted if your ground is fertile.