On 04/11/2014 18:18, FrankB wrote:
I've heard various conflicting advice for this.

What I'd like to know is whether they can be stored lais sideways in a box
of barely damp soil, in a dark cold, but frost-free garage as eg one stores
tunerous begonias? Would they need to be cut back hard first before storage?



I think I've read it all! My understanding is that they can stand cold
but not cold AND wet. Assuming your garage is unheated, there should be
enough moisture around to prevent them drying out completely. Very
interesting discussion/argument on Gardenweb about whether they need
moisture at all in winter. Putting them on top of the wardrobe wrapped
in newspaper might have worked in the old days but that was before
central heating. Last year I cut mine back to 4" and put them in a cold
frame. The vast majority survived