How do i fix this ? What is wrong?

[Famers]

Something from the roots, for sure. I've seen it before

 

[Keod]

If you flush do so with a light nutrient solution that is ph balanced and temp adjusted. It wouldn't be likely to kill the roots bit your friend is right it's better to flush with a light nutrient solution.

Thanks!
But just to be sure . What exactly do people meen by "flush" ? Water each pot with 3 times much water as the size of the pot ?
Or does it just meen water them with very low dosage of nutrients ?

 

[Aqua Man]

Thanks!
But just to be sure . What exactly do people meen by "flush" ? Water each pot with 3 times much water as the size of the pot ?
Or does it just meen water them with very low dosage of nutrients ?

Both

 

[Gammagoat]

Sorry OP but I have to know.

swollen leaves

Could you explain what you mean by swollen leaves? My untrained eyes dont see it.

 

[Keod]

Sorry OP but I have to know.

Could you explain what you mean by swollen leaves? My untrained eyes dont see it.

Me neither

 

[Aqua Man]

In-between the leaf veins is raised making like little pillows.... swollen

A clear example.

 

[Keod]

In-between the leaf veins is raised making like little pillows.... swollen

A clear example.

I still find it hard to see but thanks ! On my next run I will try to overwater them to better see for myself

 

[sportyridr]

dollars to donuts its a pH problem in the media...the yellowing I have seen in the past until I figured it out...I'd flush, don't care if soil or peat etc but thats me...I think you need to water enuff to check run off pH & ec...good luck, hope you get it figured

 

[Keod]

Okay so today i just watered with no added nutrients with a bit extra run off.
I realised that giving them 5 of water for 15l was not enough to get some run off so i gave them 7.5 l for a change.

Also since I passed to flower the day time schedule is from 23h00 to 11h. Wich has been unpractical to feed them due to the time window I have and my job. Causing me to sometimes to water the next morning or night. So that means I waterthem every 2-4 days ...
Is it possible that they could be underwatered? Could that explain why the only plant out if the 4 that is completely healthy is the smallest one? Since she does not drink as much as the other 3 because if her size ?

 

[Tasty Buds]

On that 1st pic....This is a pretty rare lockout, possibly deficiency, but you need to take care of it asap, as you're in flower.
Look up Boron deficiency. I believe if it's not a ph issue, and a true Boron deficiency, if I remember correctly, eye drops will fix if if it is a deficiency.
First check your runoff, and make sure your ph is in range, as that's most likely your issue

 

[Tasty Buds]

Here's a pic of B deficiency. It looks like you've had it for some time. I've seen Boron get Locked out, but never a true deficiency. Because of where you are in flower, it's going to substantially reduce yield.

 

[Scrogger2190]

Hit it with kelp and molasses

 

[Keod]

Update. 2 days after watering with just plain water with a little runoff.
The only plant tvat was healthy until now is showing signs of deficiency...
So now many only course if action is to give my 15L pots 45L of water to flush out nutrients in xase if nutrient lock?
If yes when do I reintroduce nutrients ?