Here is what I got out of the ground this year. Should keep me in horseradish for a while. My worries about not leaving enough in the ground to get a plant next year were unfounded. The stuff in the pic was tough to get out, and I left several pencil thick runners in the dirt, mostly because it would have been a pain to get them out. Think I'm going to make some French Dips tonight to celibrate. Thanks for all the advice everyone.