leave suddenly turns yellow and try from the top.

[temple_of]

Is someone able to identify what kind of problem could this be? leaves suddenly turn yellow and dry from the top. what to do with this?

 

[namvet25]

Need more info.Age of plant,type of nutes with npk numbers,type of soil,are you using cal-mag?

 

[temple_of]

2 months old, nutriens biobizz - Bio GROW, Bio BLOOm, Top MAX 100% organic, standard soil with perlite, no I dont use cal-mag.

 

[temple_of]

I am thinking to create the list of known leaves problems and explanation with the pics.

 

[Waira]

already done here mate! https://www.autoflower.org/threads/...panded-to-include-other-issues-as-well.43164/
https://www.autoflower.org/threads/...panded-to-include-other-issues-as-well.43164/
... Hmm, an odd mix of symptoms, and where it's hitting,... BioBizz is very mild, so defc.'s can happen more easily,... the tip back wasting and poor bud development looks like P defc., but it's hitting up so high, not at all typical, ...only other thing that really fits is Cu defc., rare... a soil pH is needed, to determine if this is a lack-of defc., or an off-pH lockout type of defc.,...

 

[temple_of]

@Waira - great link with pics
ph is somewhere between 6.5-7.0
immediately stopped nutriens, and adding just water, I am thinking about to cut it.

P defc means pottassium?

 

[TexasGrower420]

It's light burn. More light than the plant can use will burn it, even with no direct heat.
I am currently dealing with the same problem.
Move your plant from directly under your light or just break down and get a light meter.
Hope this helps.

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[temple_of]

really? it was about 40 cm ( 1.3 foot ) above the plant, led light.

 

[temple_of]

look at the pics, is it not very very low?
these are the pictures I found on net

 

[TexasGrower420]

It has to do with the lumens, if the plant is getting oversaturated with more light than it can absorb, it will "Taco" from light burn. So, too much light will burn. The plant can only absorb so much.
I hope I was helpful to you bro.
Your ladies are very beautiful also!

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