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Do you have any green growth? I'd be tempted to cut off the dying leaves
I find them hardy here, if it looks like it's got new growth coming through I would cut off the dead leaves to allow light to get in.
I got a small one last year and split it into three
I just pulled it apart, it divided really easily into 3 pieces and just popped them in the ground. Only one had a go at flowering last year but should get flowers off all three this.