Where can I find Sweet potatoes in Langerwehe?

Sweet potatoes can also be found in these cities:

Aachen Alsdorf Baesweiler Bergheim Düren Eschweiler Geilenkirchen Kerpen Kreuzau Niederzier Nörvenich Stolberg Vettweiß Zülpich

You can also find this in Langerwehe:

Milk Baking Ingredients Beer Jam Vinegar Beef Spices Normal Rolls Acid Preserves Vegetable Oil