Where can I find Rhubarb in Wuppertal?

Rhubarb can also be found in these cities:

Bergisch Gladbach Cologne Erkrath Essen Hilden Langenfeld (Rheinland) Marienheide Mettmann Solingen

You can also find this in Wuppertal:

Edible Curd Grated Lemon Peel Flaxseed Bread Fruit Bar Pickled Vegetables Fresh Salt Schupfnudeln Whole Grain Rolls Mayonnaise