Hi Waggi, when I dug my allotment found this dark horrible root in the soil. Chucked it in the trench as waste. Along came my neighbour, informed me the black mass was in fact rhubarb. I had already chopped it into smaller bits in the trench. He picked up the pieces said it'll grow. Low and behold I have 6 new rhubarb plants shooting in a nice tidy row. So I'm sure it doesn't really matter what you do to it, just plonk it back into the ground after splitting it. Cover it with manure and wait..
