Liked No 4 . With some suggestions:
The logo looks like roAitup in first look and not rollitup since the to ll are attached in the way that is partially resmbles A.
somebody said before that it looks like juvenile , I agree considering with some modification it will find the right character, Character is the thing that other 3 lack it.
That bean(or calix or whatever it is) looks like is smoking a cigarrette not a joint,we use our 2 finger to smoke a joint especilally when we keep our grap of the joint as close as possible to the lip end.
The joint does not look it is burning since there is no smoke , it can show smoke from the joint and the head of the bean that is smouldering of being high
The color of the fire if the joint head looks like strawberry skin in close up, needs more work
There is no sign of GROW in your Logo but your website is seriously about Grow so it is seems relative to draw some roots extending from the lower end of P in rollitup downward to show grow in your logo.