There exists at this time no way to obtain weed. There aren't any cannabis merchants. You will need to increase it by yourself or be part of a cannabis club. Another way of obtaining weed in Berlin is with the street dealers present in Görlitzer Park and Volkspark Hasenheide. https://where-to-buy-weed-in-berl91356.kylieblog.com/33640334/where-to-buy-weed-in-berlin-fundamentals-explained