Black on sides of leaf blades. Only on new growth, any ideas?

This Jack Herer has been flowering for 11 days now and the new growth is looking like shit. Some of it has like dried up. There is black on the sides of the leaf blades that causes a dip in the side of the leaf. I have never seen anything like it. Did some searching on riu but couldn't find anything similar.

Jack:
Planted in two gallon bucket - happy frog soil "foxfarm"
Fed twice a weak using a mixture of fox farm big bloom 3tsp and tiger bloom 2tsp per gallon. I also have two white widows which are fine and all plants were loving the nutes, no burn at all. And just recently jack has gone bad.
Under a GE 400 watt hps. vertical method.

sorry in advance for the bad picture quality

Does the bucket happen to have holes in the bottom?

check for bugs. kinda early to see micro nute deficiencies, but its always another possibility

nick17gar said:

check for bugs. kinda early to see micro nute deficiencies, but its always another possibility

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No bugs and I doubt there is nute deficiencies but I guess you never know for sure

MoonRaver said:

Does the bucket happen to have holes in the bottom?

Click to expand...

Yes it does have holes all the way around the base of the bucket, bout 3/8'' each, why do you ask?

bump^ - still haven't found cause of problem

Nobody knows what my problem could be?