I planted 12 last April in a bed 7' x 7'
Roughly calculating I must have dug up over the winter 300 artichokes.
Yesterday I spent over 2 hrs going over the bed rooting around etc....
I feel sure I've got them all out but, you never know.
I just got a bit confused because like you say Bob, I knew they were from the sunflower family but they look like a tuber, (potato) so that is my concern.