Leaves EXTREMELY thin. Whats should I do?

has this been consistent leaf structure throughout grow? - genetics. if it is a change in growth behaviour, it's too much P or K ... both of which can do this, and both of which would have other coinciding symptoms. 1 Get a leaf chart. 2 Look for the symptoms 3 Eliminate possibilities Sooner you start doing that one your own, the sooner you don't have to rely on others misinterpreting the same knowledge base you have access to. If not doing it, start... of course, it takes time and perfectly fine to ask for help any time... but, the people that put a little into it will do better in the long-run.

No one seems to understand that alot of these types of things are Genetics. Period. Frankly don’t see much of an issue with it.. I’ve never worried about how thin my leaves are. I’d prefer them to look like yours than thick and leathery, that’s a bad look and caused my other things.

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Yup..add silica. Some autos grow so quick they are more prone to mutations. So, some silica. You can apply this as soon as you hit pre flower. Which should be soon..that's the only counter measure I got for you. Sativas have long thin leafs likes yours. Good growing

Hola. Es por falta de riego. Las plantas mantienen agua en sus tallo y hojas. Si riegas poco tu hojas se vuelven finas y quebradizas.

Sorry, englush is not my mother language, anyway, it's watering is not a possible problem for this plant. You have any other guess waht it could be?

This can be caused by many issues. As said below underwater can be the main culprit. Id put it down to high temps. Overall your plant looks well. They look like sativa leafs. As they have longer leafs. Add some silca to your grow it'll help strengthen your plant overall. Good luck

Who said over watering ?

It's not overwatering, I give it watter/fert 3x a week, Im sure that's not the problem.

Under watering can cause this. I would give them a good watering. It could also be in the genetics.