Posted: 04/08/2012 at 11:10
Difficult for me to remember exactly, as I moved the main big plant into the garden at the end of last Summer. I took the offsets as a bit of an experiment so they were overwinted in a coldframe and then I planted them out earlier this year.
I think if you did it now they wouldn't take long to root. With the ones that are in the garden I just gently make sure that the runners are touching the soil, with a bit of bark or small stones and they just take root all on their own.
When I removed the original plant out of its pot I was amazed and how much root there was. You could probably get away with dividing it as well