Nitrogen toxicity?

I think your in the right ball park of N tox, some of the older fan leaves show the tips bent down and this might have been an on going thing. I got in soil a lot and would not PH down to 6.2 its a bit to low and cause some issues. I would aim for around 6.5-6.8 but play aorund with it and see what works best for you. It would help is if you uploaded photos of the brand nutrients your using and their NPK ratios, if they have macro and micro elements or just macro. It looks to be a part of ILGM house brand. This is a dry crystal feed from what I can tell and as such you will need to monitor your EC/PPM. salts will build up in the soil and affect the roots, soil also does not flush well and should not be flush as it can compost the medium and drown/suffocate the roots. I think your grow will go well if you manage to wring in the feeding concentrations and keep it in a good level as to not overly saturate the medium and cause salt build up and lockouts. Best Of Luck! ***disclaimer, multiple people are answering all questions as there is a contest called GOTM, when a user is selected as the answer they get a point. Please see the contest page for information regarding the details: growdiaries.com/giveaways/GotM-August-2022 Please note, when you reply to anything on the questions part of Growdiaries website, no one will be notified of this. Not even if you use a "@" tag in their name. Best to reach out to them in DM using your inbox, it can be found in the bottom right hand corner of the site. It's the small paper airplane button, it will be highlighted green if you have new messages***

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.