Good King Henry has been grown in European cottage gardens for hundreds of years. It is extremely rich in iron & vitamin C & is a fairly hardy perennial.
It won't do much for the first year but after that the new shoots can be picked & cooked.
Good King Henry is in the same family as spinach and its leaves are used in the same way, however, its shoots are eaten like asparagus, flower buds like broccoli and the seeds are an edible grain as well.
Good King Henry does not respond well to transplantation.