and no....not the kind of weed taught in Herbology at Hogwarts (though that could be a long list of what is or what isn't legally grown at Hogwarts Herbology or in the wizarding world)....unless Hogwarts supports students growing Cannabis
Seriously though.....this is depressing....he had so much going for him....perhaps once he's out in 14 years if he gets that long things will turn around...
Edit: apparently I forgot to link a source so here it is:
Without getting into the moral implications of marijuana usage...
Everyone knows how psychotic cops are about busting people for using illegal drugs, especially celebrities. If you take that risk with pot or anything else and you get busted- you knew what could happen to you. And if you didn't... you're an ignorant fool.