Posted: 16/06/2014 at 08:28
Snoodle, you can either dig a whole plant up, overwinter it frost free,cut it down in spring and it will regrow. You can do cuttings then.
Or you can take cuttings of strong unflowered shoots about 7cm or 3incheslong, in August or September, and root them and just overwinter the cuttings. Or for belt and braces you could do both.
This year the outside one's were doing better than the dug up one, so I took cuttings off the outside one's in March. They are now in flower. Just luck, not what I would usually recommend.