Posted: 02/11/2017 at 14:55
You can lay the rhizomes in trays of potting compost - if you look carefully, you should be able to spot little "eyes" so lay them with those uppermost. Some may have straggly little roots so bum down for those Not really essential as they will eventually shoot/root in the right direction once they start to grow.
Cover them with the same depth of compost , damp them and leave. Those which are good will show signs of growth come the late winter/early Spring.
Once that occurs, my advice would be to pot each one individually, grow them on and plant out when they look reasonable. You could also keep them in pots until Autumn or even the following Spring before planting out in your chosen area.
Others may have better advice so hang on and see what comes up. I have to say that I have struggled with mine so wish you the best of luck with yours.