Posted: 08/11/2016 at 13:20
You've done it the traditional way Wakeshine.
1. Let the first frost blacken the foliage
2. Dig up the tubers, cut off the foliage and shake off as much soil as possible
3. Put the upside down onto sheets of newspaper in a dry frost free place.
4. When most of the soil has dried and fallen off, wrap them in newspaper and put them in cardboard boxes and store in a frost free place until the spring.