I really don't know what happened to the second one from the left...any comments?....it was always the smallest and the leaves are different, long and thin, ....I realize that it is Haze Extreme, (sativa and indica)...haven't sexed them all yet, still too early...out of 10 seeds, they all came...
I'm thinking that this is called fertilizer burn....could be wrong, but I have had this happen to me, and I just waited 24 hrs, and then flushed with water, and continued using just water for 2 weeks...hope this may help you...