There exists at this time no solution to buy weed. There isn't any cannabis stores. You will need to grow it yourself or sign up for a cannabis club. Yet another way of having weed in Berlin is in the street dealers found in Görlitzer Park and Volkspark Hasenheide. https://where-to-buy-weed-in-berl91346.blogoscience.com/39325169/5-essential-elements-for-where-to-buy-weed-in-berlin