Mid-Late Flower Deficiency or Nute Burn?

People always underestimate PH, temperature and humidity.

I have found it to be devastatingly important, its the baseline you should use to figure out issues first.

A low or high PH can result in nutrient deficiencies showing up due to nutrient lockout.

Its like driving a Ferrari and having bad handling - you take your car all the way back to the dealer, get the wheels replaced to discover your tyres are flat.

Ok so over done on phosphorus causing Iron,Zinc,Ca and Mg to be locked out.That matches your pics.

I would say you've probably locked them out too. You have to be careful with the recommended dosage on fertilizer as they are usually too much for this specific plant species (plus your other additions youve added). People normally do a quarter strength and build upwards to a maximum of half to 3/4 of the dose in heavy flower, something to keep in mind. Going to plain water again and build your feeds back up. Bit awkward in soil in this stage of flower. But if your pots usually dry out fast it will be easier.

OK, so I decided to do a flush, about 3x the pot size but if I need to do more, 5 gal pots not all the way full so 12 gallons on the perfect flush. I probably did 9 or 10. I tested the runoff and at the end of my flush, the ph is sitting at 6.2 and around 2000 ppm. I may need to flush more but I will give it a week or so and see how she handles this and how she responds. Thanks for all the helpfolks!

K deficiency along with nitrogen, when the burn goes in further than just the tip it’s a k deficiency also yellowing