Posted: 25/10/2014 at 22:23
I think you're supposed to gently lift the corms, dry them and clean any soil of them and then store them in shallow peat free compost.
But, I think I may try to leave them in the ground and heap loads of mulch on them or maybe even fleece them. They're very sheltered, behind a wall. As you say though, they're still flowering really well and I may change my mind and feel sorry for them if Mr Frost comes to visit.