Yellowing top leaves - help

[dvchava]

:smoking:-- I'm leaning Pop's way on this too, this color fade pattern smacks of S defc.,...much of the plant can go pale, but tops are worst,.. S is an immobile nute element, so newest growth will suffer first... ( this means the plant can't remove it from other older established parts of the plant, mainly fan leaves, and send it up to where it's needed most--new growth).... temps are a bit high at 29C,...what's thr RH? ... and we for sure need a soil pH, just to make sure there's no lockout happening here,... best, fastest source of S is epsoms salts (MgSO4),... for defc. treatment, 1tsp/qt, for 2-3 rounds, and/or even better and fastest of all, a foliar spray at half that dosage... this needs to be done right though, to be effective... if you want to try, let us know and we'll tell you how,...a water spreader/wetting agent is critical to this, readily available at grow shops...

Hi there my RH is 60% lights on \ 70%(max) lights off.
My runoff ph is about 6.2/6.3. Is there a problem with this ph? Is it too low?
I'm starting to get a little worried my girls are worst.
Thanks for the attention !

 

[Waira]

...RH is a bit high, you'll really want to get that below 50% as blooming progresses though,... As for pH, run-off alone is meaningless, without knowing the water's pH beforehand, and doing the proper method and calculations... here's a link to it, and bear in mind, any run-off testing is just an estimate, and this method is prone to measurement errors in general,...(https://www.autoflower.org/threads/...-for-run-off-testing-and-ph-estimation.41733/).... are you using a pH meter for testing, and have you calibrated it recently? repeated use will also cause build-up on the components, compromising accuracy, so a cleaning solution is available for this as well,... It'll take time, a few days usually, for things to in there and working, so there will be some progression of symptoms meantime,...

 

[dvchava]

...RH is a bit high, you'll really want to get that below 50% as blooming progresses though,... As for pH, run-off alone is meaningless, without knowing the water's pH beforehand, and doing the proper method and calculations... here's a link to it, and bear in mind, any run-off testing is just an estimate, and this method is prone to measurement errors in general,...(https://www.autoflower.org/threads/...-for-run-off-testing-and-ph-estimation.41733/).... are you using a pH meter for testing, and have you calibrated it recently? repeated use will also cause build-up on the components, compromising accuracy, so a cleaning solution is available for this as well,... It'll take time, a few days usually, for things to in there and working, so there will be some progression of symptoms meantime,...

I cleaned and calibrated my pH meter before use.
I've also measured the pH of the water before watering and it was about 6.5 pH.
Thanks for the attention Mr. Waira

 

[dvchava]

My girls are getting worst.
The lower leaves seem to be affected as well like N def or something... I wish I was a professional
(sorry about my English)

 

[Waira]

....pH is a bit low, but not an issue .... your English is just fine, mate!.... have you started the epsoms? And are you feeding her diluted nute's, or full strength? I'd need fresh pics of the bottom leaves to see what else might be going on,... some yellowing of lowers is normal for this stage of blooming, but if she's kinda starving, there's no reserves, so the plant will tap into her fans sooner, and harder, and typically it's N she's drawing out from them.... remember, it'll take a few days for noticable reaction from the plant,...

 

[dvchava]

....pH is a bit low, but not an issue .... your English is just fine, mate!.... have you started the epsoms? And are you feeding her diluted nute's, or full strength? I'd need fresh pics of the bottom leaves to see what else might be going on,... some yellowing of lowers is normal for this stage of blooming, but if she's kinda starving, there's no reserves, so the plant will tap into her fans sooner, and harder, and typically it's N she's drawing out from them.... remember, it'll take a few days for noticable reaction from the plant,...

Hello, and thank you very much for your attention
I fed the girls yesterday with AN Sensi Bloom A&B 2ml of both. They are 43 days old.


(sorry about the quality of the pics)
The most affected parts seem to be the most exposed to light.
Plant 1: this is the "healthier" girl, not very well...

Plant 2: The worst and sickest girl

What do you think I shoul do bro? :/

I'm very glad to receive your help thanks bro !!

 

[TaNg]

Underfed. I explain in the schedule if the plants colour fades bump up the base nutrients. Great looking plant apart from the colour fade.

 

[dvchava]

Underfed. I explain in the schedule if the plants colour fades bump up the base nutrients. Great looking plant apart from the colour fade.

Thanks mr. Tang are you sure that is lack of nutrients? I've been feeding them Sensi Bloom a&b 2ml per L of both (A and B) and with 1ml per L of carboload. :s Should I had more nutes next feed?
Thanks for the attention

 

[TaNg]

Thanks mr. Tang are you sure that is lack of nutrients? I've been feeding them Sensi Bloom a&b 2ml per L of both (A and B) and with 1ml per L of carboload. :s Should I had more nutes next feed?
Thanks for the attention

Bump it up to 4ml of each per letter at the next feeding then 3ml of each for the following feeds. My feeding schedules are just a guide bro some plants will want more strength some less. lovely looking plant bro and she will reward you well also a good lesson learned about reading plants.

 

[TaNg]

Looking at the plant again she looks ready for Overdrive too if you have it,just add it to what I suggest above.