Quote Originally Posted by Nochowderforyou
It's the nutes, and that is clearly overfeeding. Lower leaves shouldn't be dying off already. That commonly happens to an over-vegged plant and a plant that hits flowering. When they are that young, they shouldn't be losing any leaves yet.

Ease up on the nutes, and only feed 1/2 strength once a week, but for the time being, water with clean water until the burning/yellowing has stopped, then start feeding again.
I disagree. The lower leaves, such as the cotyledons and first 2 serated fingers normally die off at the stage the plants in question are at, so i'd say THAT is normal, not a problem. Altohugh, as with the large yellow spots [I've now looked at the plants, and its not really small] i'd say it is nutes.