With the stuff that goes around on the streets, 1.5 grams is about right. The less it's handled the better it is. What gets you high isn't the green leafy material. It's the small white "crystals". That's the THC. Those "crystals" are very fragile. Alot of them get broke of when compacted into bricks. Then the bricks are broken up into, usually, one pound bags. Then onto smaller bags. Alot of people usually end up handling the pot before it gets to the consumer. There for more and more of these "crystals" brake off making it less potent.It depends how you tend to the plant and what type of plant it is. 1.5 grams per doobie? Someone is rolling themselves a hogger. If you're growing the right kind of pot you shouldn't need nearly that much in one doobie.