Depends on your ventilation situation. Lots of smoke is bad for plants as the tar can clog the stomata (little holes on the underside of the leaves which allow gas exchange) in the same way it clogs your lungs. Less air means less growth, so not so good. Also although the bud in your joint contains lots of phytochrome (the hormone that causes budding) it is broken down when smoked so is no longer functional.
On the other hand, burning any material does release carbon dioxide which of course will speed growth, but i'm thinking net effect would be bad.