[DD.]

I had one re-grow back this year. Moved it to the new bean fence. Can't tell you how it did, as it got lost in the jungle of the others!

[coatesi]

Soon as the tops brown off I pick whats left for seed and cut down the rest. The roots re-shoot the following year and I fill in the gaps with the saved seed. Every three years I dig them up move the frame and plant new seed. It works good for me and I get more than enough for our needs. Some of the roots I've dug up are like dahlia tubers.
coatesi