deficiency or toxicity?

It looks like yellowing off to me. The buds and rest of the youthful leaves are green and look great. At week ten of flower it’s normal on some plants to do that by yellowing and dying off. It’s where the plant isn’t taking the nitrogen it use to intake. It’s telling the plant it’s time to swell out pistils for pollen and finish up. By the amount of them yellow and reddish tones I see, you got about two or three weeks to go till harvest, good luck

I have gave them to many nutrients and maybe u haven’t mixed the nutrients properly and had a bad ph. Ur plant takes up different nutrients better at different ph levels so it good to switch between 6.4 to 6.0 to 6.2 and mix the nutrients properly and make sure water is room temperature before watering and after u mix ur food never leave it over night ur ph levels will change!!!

Hello i am agree with Dasboof you have potassium deficience and calmag also. So now you must make a flush . you can do it with just water or you can use an additive like florakleen to flush your plant. Then give half dose of nutrients. You can add fulvic blast or enzym+ it is a good idea because it will helps your plant to recover sooner. Good luck. Bye

Hey there Ganzigunnu , What happened is there is a pretty serious nutrient lockout . I see multiple symptoms for example the burnt tips, PK deficiency, calmag deficiency like rust colored spots and discoloration around the edges of the leafs. I see you're adding plenty of PK and calmag, so what i think happened is the multitude of additives you're using made the nutrients "too available" and over time this caused a lockout. What you want to do now is a flush. This you can do by watering until runoff then water 20% more. The next time you feed, you can add the calmag and NPK back , but only choose one of the additives for example fulvic blast or Enzym+ , keep this schedule until the end and you should be fine. Unfortunately the plant is stressed and will take 10 days to 2 weeks to fully recover. I hope this helps ! 🚀