Hello all just thought I should add my observations as well, I grow many Cyps in the garden ordinary soil with extra grit and some leaf mould the potted plants get J.I. sterilised soil based compost with added Perlite, sharp sand and some grit, we keep those fairly dry in winter start feeding when we see growing noses, I divide plants just as they are starting to die down leaves go yellow lift plants shake of compost get my Stanley knife blade with care cut between the noses, the either re-pot or plant back in the garden, I am posting some pictures showing this method, cheers Ian the Christie kind