Come on man what kinda info is that your giving out 3 - 4 inches? mother nature dont turn her wind off until her creations are at a certain hight does she? as long as your not too close to blow the shit out of em ur good, and i think oscilating is better than a constant flow as this keeps all the air circulating in your room, and gives the plant breeze from most directions as it bounces off the walls.i would wait until it is about 3 or 4 inches tall then and add a fan for that cool breeze.