BudBogart said:

Search "plant abuse chart". It's got photos of all sorts of problems.

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johnylab said:

npk is 30-10-10 I started reading that it might be a little on the Nitrogen,, what do you think?
Also, I read already a couple of times that the leaves are curling up trying to protect themselves because of too much light/heat... I lifted the LED's but I wanted to ask, what do you think about lowering the cycles to 14/10 instead of 18/6?

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BudBogart said:

I don't think lighting is your problem.
I don't know spider mites, others will help.
On your ferts...in the future, NO time release! Why? When canna switches to flower it wants more potassium than nitrogen. You don't want to get shots of nitrogen released during later flowering.
I have tried growing in soil way too hot. I got stunted growth and plants that look a lot like yours.

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