My Friend is trying to stop smoking Pot and i want to help

You cannot deceive a real pot head into thinking that basil is weed. It might happen for a few days if you are lucky. However in reality the truth is not far behind. It alters the mind and the effects are obvious. So basil will not do any of that. Your friend is going to yell.//" someone selled me bad stuff!".
You might want them to stop and maybe they do not. Sometimes it is a way of life. The pothead has to want to stop before they can. Most likely they are going to need to get a new job, a new place to stay and "Straighten up their life". Until they want to themselves....there is no real way to make them stop. Rehab might help? You need to talk to your friend straight up about this.
I stopped a long time ago....when the final bag i had...was laced, and I found myself talkiing with GOD>. I realized how crazy my mind was becoming and how deep it can go to alter the mind.