Im no expert,but it appears there`s a deficiency there.Tell me,save me reading back, is your medium fertilised ,or was it neutral?As for fast growing,I had one that visibly grew in aan hour that so amazed me I called the wife,told her to look at this plant and view it again in an hour. She could`nt believe it ,either. Its the only time ive ever seen that. It was a regular seed,which turned out female. It must be great to openly grow with no worries. I got a clone outside but is hidden,and being small gives off no smell,yet.