Specifically, the smoke causes the stomatae (air pores the plant breathes through) to close and growth will be stunted. Just in case you were curious about the why part.

Thank Zandor for that tip. I learned it from The Grow Report. :thumbsup:
canuck grower Reviewed by canuck grower on . is it bad? is it bad to smoke in your non-ventalated grow room? just a quick question because i spend so much time watching them grow.:smokin: Rating: 5