When a child goes off to college while in recovery, a parent is justifiably worried. Suddenly their child is far from home, where there was a strong support system that guided them into recovery. Colleges today however, are much more aware of substance use disorders and many have adapted accordingly. With some planning ahead, students can maintain their sobriety in college.
If I had to characterize pot users in one sentence I would describe them as observers of their own life. This passivity cripples ambition and motivation. However, a strong relationship keeps the bridge open between you and your loved one, and this will be vital when they signal a desire to change.