Looking for fresh endive in Berlin

Evening, I live for several years in Berlin. In the Netherlands is "stamppot" part of the food culture. It is like mashed potatoes with cabbage, carrots or endive. For some reason I can't find some fresh Endive here in Berlin. Its got some similarities with Grunkohl but still totally different. Looked at several farmer marktets, supermarkets and bio stores across the city. Someone got an idea where to buy endive for human consumption in Berlin? (found some endive at the pet store lol)