How To Use Progressive Web App aka PWA On 420 Magazine Forum
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Thats true and often it vanish without any "countermeasures", I think in this case it´s calcium (Ca) or manganese (Mn) deficiency, hard to tell the differece between theese two..Well thats a well developed plant for 2 & half weeks of flowering.
Its quite normal for plants to show some sort of defeciency whilst in the flowering stage & ye you going to get more crispy leafs as the weeks go on...
The plants tend to use more P & K during flowering with the older fan leafs being used as a source of energy/nutrients to help support the plant in flower.