Nitrogen toxicity?

You're right, it's a nitrogen toxicity. Feel free to message me and I'll walk you through why and the harm it is doing. As well as how to correct it and make sure it doesn't happen in the future. I'm just a bit short on time at the moment.

High Yardbuds, I can not tell you what deficiency this is becaue it is only the new growth. The cause of this dificiency is or pH issues or nutrient lockout due overfeeding. You can measure the pH from your soil to make sure that this is not the cause. I will explain how to do this and if the pH is in the right range then you need to flush your soil so you can start giving the right amount of nutrients again after doing this. But I will first explain you how to measure pH in soil, just follow these steps. Your pH should be around 6.2. 1. Place soil sample about ¾ full in sample jar and add distilled water to cover soil. 2. Cap the jar and shake the soil vigorously a few times. 3. Let mixture stand 10 minutes to dissolve the salts in the soil. 4. Place the pH tester into the wet soil slurry. 5. Measure pH and record measurement. If the pH is in the right range then flush out the nutrients with a good flush of your soil and I will explain you how you can do that the best. You can do this flushing by slowly pour water pH 6.2 onto the top of the soil, allowing it to drain freely from the bottom of the pot. Pour slowly, so the water doesn't overflow from the top of the pot. Use approximately four times the pot's volume in water to flush the soil. For example, use 1 gallon of water for a 1 quart pot. After the flushing you need to let the soil (almost) dry out completely. From there you can start giving water with pH 6.2 and nutrients but do not exceed EC 1.2 to make sure that you don't overfeed them and up this every week by + EC 0.1 till you reached EC 1.8 (do not give more then EC 1.8). Happy Growing! 😋

To me the plant looks mostly fine. I think if it was specifically nitrogen toxicity the older leaves would be much darker than they are. Leaves curling/clawing under is certainly a side of over-fertilization - but it can also be a sign of Potassium and Copper deficiency if accompanied with other things. The fact that your bottom leaves have a slight yellowing leads me to think it's probably not nitrogen, and your leaves aren't overly shiny which they would be if there was nitrogen toxicity. I'd say watch it for another few days and see if any leaf signs start popping up like necrosis, yellowing, mottling, etc. Sometimes new growth can just be more curly than other strains until it grows out more.