NYC Sour Diesel hängende Blätter

Hi, I would try it with methamphetamine, best regards

Have you measured the light?

What are the EC and pH values of the watering solution? It looks strongly like a deficiency is developing, which is caused by a nutrient blockage. If the pH value isn't correct, nutrients can't be properly absorbed and accumulate in the soil. This creates an excess, which in turn leads to a deficiency, usually of metals like iron, zinc, and manganese. I can only assume this if you're using a strong nutrient solution but the pH value isn't correct. To be sure, I would definitely keep an eye on the pH and EC values constantly, especially during flowering.

high vpd? too much light? proper watering habits -- 1) fully saturate (10% runoff if soiless) 2) wait for appropriate dryback and repeat. If not doing something as simple as this, probably doing it wrong and part of the cause.