I noticed only a couple leaves out of a 4x4 gg4 grow show weird marks. Just wondering if it's cause for concern since it's my first grow. Otherwise they appear to be perfectly healthy, growing great and praying going on 4 weeks into flower.
Hey Fam I wouldn’t worry to much your doing great I wouldn’t change anything your doing especially if the rest of her looks healthy good luck hope this helps
It looks more like a calcium deficiency. It is also possible that there is a fungal infection. To understand this, put your finger on the affected area, if the stain comes off easily, then it is a fungus. We wish you success.