Hi, they would probably be better off either planted straight into the ground, as long as it isn't frozen or waterlogged, but if you want to keep them in pots, then a cold frame would be ideal, left in a warm greenhouse they will go ''soft'' and need hardening off before being planted out in spring, Derek.

They are perennials and require a winter dormancy period.

thank you i will put the in cold frame

I answered this in your previous post. Like Derek, they need to go out into a cold frame area before putting into the open.