yes I did a few years back by accident I cut through a clump with a spade. the cut bits died off but the undamaged 'crowns' grew away well. I planted them straight away back in the soil.

Hi Andy, as you know these are normally divided in spring, but you may not be too late to do some root cuttings, should be late winter, but we're not into proper spring yet, only met office spring, just try a few, Derek.