Travellers (and locals) are unable to order Cannabis products and solutions that contains THC in Germany, and this would possibly not change. You cannot lawfully take weed from the German local who is escalating it for their personal use at your home. This would criminalize you and him. I.e., https://andresqpgvj.blogolize.com/not-known-factual-statements-about-buy-cannabis-in-germany-75441301