HELP! nutrient deficiencies or excesses?

[polaris]

Please give me advice.

I’m first timer.The growth of my plants seemed to be perfectly fine until the flowering period.From the flowering stage, brown spots and burns began to be seen on the leaves.

The new leaves are thin, I suspected that there was too much nutrient and continued to give water without adding anything for about a week, but the brown spots and burning of the leaves progressed.

In addition to the fact that the condition did not improve after a week of nutrient removal, it used to be purple, which was only the stems of the leaves, but now the main trunk has also turned purple, so I suspect that there is a shortage of nutrient. The old big leaves are getting yellower and yellower.

I can't raise the lights higher due to the height limits of my tent, but I think it's different from light stress.

There are two plants, both of which are auto flower.
The short one is the AK47 Auto.
They are currently in the 8th week.
I also feel that the speed at which the flowers grow is slow.
Will you be able to harvest safely as it is?

[Rwise]

Whats the PH?

[polaris]

thank you for your comment!
The pH values are about5.9 and 6.4.

[Rwise]

PH in flower wants 6.5-6.8, this is where she can feed the best.

[Cali]

To be honest looks like light burn to me. What is the intensity and how close are your lights? Makes me lean towards that because that’s how my plants looked like when I was blasting home with a 400 watt HPS in a small 2x4 tent. Made the switch to leds and that problem was gone. Look at the leaves they look like taco from heat stress and light burn.

[SoOrbudgal]

They are getting nanners also looks like hermi from stress

[polaris]

Thank you for your kindness.

Try adjusting the ph according to your advice.

And surely my lighting is very close to the plants. I am using a 600w LED. I want to increase the distance from the plants to the lights, but the size of the tent is a hindrance. However, the burns also exists far from the light.

The nutrient content ratio that I received the advice was very helpful.

thank you.

[SoOrbudgal]

Pull them branches away tie them to a pole

[LemonBud]

Try bending those girls over carefully.

[polaris]

thank you!
understand, I’ll try it.

and If nutrients were the problem, is it difficult to tell if they are deficient or excessive?

[GuitboxTom]

I’m no expert but, all the advise looks to be right on to me. These folks know their stuff. One thing though, I’d check your humidity. Be sure you don’t get any mold issues. And you might want to prune all the yellowing and crappy leaves. Some of this looks like normal yellowing as the buds grow and suck out nutrients from its own leaves.

[polaris]

thank you!
There seems to be no worry about mold so far. There are many burnt leaves, but the buds are getting whiter and whiter. I hope they will grow as they are.