Hey Guys,
Fourth grow and first time this is happening to me.
Some leaves are discolored and it looks like it starts from the edges.
What could be the cause for such problem?
Notice how the edges of your leaves are 'folded' inward? This is the "claw" due to nitrogen toxicity.
You didn't recognise the plant's signs and now she is going into the next stage of toxicity. That is all the little "discolouring" you mentioned.
Dis you recently start giving nutrients or a different type or increase the amount. It looks like nutrients burn to me. That plant is probably a little more sensitive than the rest