Yes you can but mak sure you bury them as deep as they were before. Or lift, separate and store them frost free and then replant in the spring once they have re shooted.

Hi, welcome to GoY, I agree with Seaburngirl, but remember that the new shoots will come from ' eyes' on the old stems, not from the tubers, so make sure that each division has a piece of the old stem, with at least 1 eye, Derek.

http://growingforshowing.blogspot.co.uk/

That's what I do. No need to wait for a frost.