Posted: 26/07/2015 at 11:27
I'd cut it back and let it start again. and treat the soil as Fairy suggests,
I grew one of these when I lived in Essex. One winter the overflow pipe from the bathroom flooded in then froze, it was called the icicle tree by ythe kids. It survived.
I've just started 3 here , one in very poor dry soil, so will see how it copes