that looks an awful lot like fertilizer burn to me, but I will defer to the experts. I would submit that you might have over fertilized while the plant was susceptible because of transplant shock, i would flush out your containers with a thorough watering assuming u have well draining soil in them otherwise they will have other issues from being overly wet question are you growing in already fertiled soil miracle grow e.g.?

until the experts chime in, i would do what was suggested, my plants had a little bit of this going on after i transplanted, and i flushed REALLY good, then they sat inside my living room with and ocilating fan blowing on them to help dry them out faster and well that was almost 2 months ago and they are still alive stunted but starting to make a comeback!

Eric

Well, I doubt it was fertilizer burn -- you added only one tablespoon of two different items per 5 gallon pot.

But the persistent fan could have decreased the ability of the roots to keep up with the water needs of the top. Just as if in a constant wind!

That said, would you please post a picture of the entire plants instead of just one leaf?

Oh, are they still indoors? If so, why?