I dug up a very sad neglected (over many years)rhubarb root and transfered it to our new home in Somerset, where I promptly forgot about it, leaving it in an old bucket. When I eventually found time to attend to it I simply slit the root at the obvious places where there was a glimmer of life. A portion of the root looked very dead and was discarded. Now after some four or five months I have up to half a dozen healthy small clumps of rhubarb. I will not pick this but we do look again at the very high prices being asked in the local shops for "Yorkshire" limp stems, and look forward to the tasty cheap crop we will be pulling next spring, and cursing not planting it last spring.