Very common in young plants especially with new growers who want to give their plants everything possible....which is sometimes too much.

Your newer growth is lighter which indicates that it is more healthy so you may not need to do anything at all except watch and see. Flushing would be the answer if you continue to have problems.

My very first grow I used WAY too much nitrogen and my plants turned a lovely dark blue green (almost black) Well I thought that was wonderful so I kept giving them more and more.......guess what happened. :wtf:

Good luck.
Weedhound Reviewed by Weedhound on . 1st grow, (1st problem? look@leaf) Hey there, This leaf is alot darker and almost twice as big compared to others leafs. Is this a problem? Regards ps big picture Rating: 5