Hi Danbys, these plants last or many years, I have some in my garden that were there when I moved in 53 years ago, the problem is they don't like to be disturbed, and planting in a container you would have to disturb them eventually.
What I would do is use as large a container as possible, plant it up, and leave it alone, apart from watering and the occasional feed, dead head them to prevent them trying to produce seed, don't plant them too deep, leave the tubers just visible, and you should get a few years from them, Derek.