So on the exact day the second week ended i start to fertilize since the plant were a bit behind. I fertilize them twice a week with 2ml/l. Till now that worked fine but i am a bit afraid to over fertilize them. Today i recognized, that on the back side of the leafs are small holes and the leafs are at certain spots really thin. But there also good news, when i carried them out this morning i recognized a small scent, and i am astonished that they already begin to smell this early.