I know that you probably are not going out into your lawn to grab some dandelions for the soup, but the greens can be very tasty.
As one German author put it According to ancient tradition, If one or the other herbs is not palpable, we may substitute, for "Traditions are like street lamps. They show the way, but only a drunkard clings to her!" (P. Werner)
All the herbs are noted for different medicinal purposes as well, and meant to help you get through the year healthy.
The leftover soup can be used as a sauce and served with hard boiled egg halves, or as a topping for asparagus.
Children bringing in the new Spring by eating Grundonnerstagsuppe with some crusty bread, and fresh flowers on the table!
Go here to make Green Thursday Soup complete with pictures