I used to be a heavy marijuana smoker and I know that the reason my habit became so bad was because of the people I was around. I didn't even like smoking it, as a matter of fact, I hated the taste, and it made me sick. But I still did it 4-5 times a day because all of my friends did it. Yes it's ridiculous I know. My mother (bless her heart) finally got so tired of my friends bringing me down, it seemed that her only option was to move me to another city where I could make new friends. I hated the idea, we actually had a huge argument about it. But we moved anyway. She didn't move me to a city, she actually moved me to a town that had approximately 500 people living there. What a culture shock. This sacrifice that my mother made for me, saved my life. I began hanging around with people that didn't use drugs and actually cared about school. I haven't touched marijuana since. The friends that your daughter hangs around with have a huge part in the decisions that she makes. I am speaking from personal experience. I really started to go down a bad path and my mother saw that and did something about it. At the time I was really upset about the relocation, but now that I am older, I am so thankful that she did what she did. So as a parent, you need to look at other things just besides the drug use, is your child hanging out with "bad" kids, is the marijuana use effecting school? I'm not telling you to move to another city or anything, I was telling you what my mother did to save my life when it seemed that nothing else would help. Good luck.