When splitting crocosmia do you divide the corms that are attatched to each other?

I was always under the impression that you should not. The plant flowers and grows from the top one on the string and the others act as food reserves. If you split them, then yes they will all grow, but they may not flower.

Oh thanks Owdboggy, I've just lifted these, there were bindweed roots growing thro' the roots, grrrrr! I just sort of picked the plant up and squashed it all together into a pot with compost in to try and encourage them to flower this year. May not work, if not, I'll know why!