Well, I'm not in europe, but I've tried. And failed. HBWR likes a nice warm climate.
I have managed to grow morning glories and rivea corymbosa (ololuqui), both of which contain lsa. They were pretty damn easy.
Step #1. Throw seeds in dirt
step #2. Watch plant grow.
I don't think I've ever even watered them, but we did get a lot of rain this year.