Thanks for the advice! I have moved the plant to another pot which had failed to develop any plants. I have two other pots that developed single plants, so now I have for pots with one plant in each. The plant I moved, is actually the first to develop real leafs. The other plants still has to get rid of the seed shells. But I think it's only a question of time. I was a bit worried about the plant I moved, so I'm pleasantly surprised. Now I have turned on the hps lamp and an industrial quality fan to suck out air from the growing tent. I have a humidifier in one of the intake vents, so it wont be to dry. And I still sprinkle the plants at several times a day.