What's wrong with my plant?!? pictures

I have no idea whats up with my plant. It seems to be ph fluctuation or maybe calcium deficiency but I really don't know which. The first two pictures are from a leaf that was about 3/4 of the way to the top of the plant; the problem is the black/brown spots and the leaf is curling under, the problem started kind of from the side and tips and spread from one side of the leaf to the other the problem area is crispy like a dead leaf and smells kind of bad. The last is from one that is at about the same height but is off the internodes, notice the black/brown tips.

You didn't mention your nutrients and how much your using. Also how old is the plant? My guess not knowing the other answers is nute burn. Looks a little severe but with nothing more to go on I say nute burn. Back off or stop for a little bit go straight PH water for a litttle bit.

i had the same problem with my baby plants they were burned to hell looks like you might have some bugs eating them too from the hole in the leaf

I don't know, the plant is about 2 months old, I'm outdoors, the fertilizer I'm using is 13-13-13 and I used it in the soil at about 3 or 4 weeks and used it again just about 1 1/2 weeks ago. I never used to much I don't think, I have 2 plants in a 10 gallon bucket. The one I took the picture of is the one that exhibits the worst browning, the other is a little less bad, but still does just about the same. If I do fix it will this affect flowering? Just wondering.

you have two plants in the same bucket?
not an expert but i think that's a no no, even though 10 gal is pretty big.

What ratio of nutes/water did you use?

I forgot, I used what it said on the package, I'm going to flush it so that doesn't really matter now.

ok, they might be choking each other, their roots will get wrapped up and tangled. if they're not too big i'd try to separate them.