Clones curling leaves

[Brettdawg]

My mate as some clones soem of leaves are curling.
Humidity is 39
Temp is 70 lights off
Lights on is 80-85
Being fed small amount of vitalink a&b and root stim
They are In small pots..
Any advice for him?
He said he feeds jus a small amount around the stem here are the pictures

 

[needshelpguy]

How long have they had roots? I think it could be combination of humidity and heat looks like when my temps ran too high

 

[needshelpguy]

Is he in coco? He should b wetting all the medium to run off and it should not dry

 

[Brettdawg]

Is he in coco? He should b wetting all the medium to run off and it should not dry

They rooted out ther jiffy plugs ten days ago. So they have been in pots ten days now.

 

[needshelpguy]

They rooted out ther jiffy plugs ten days ago. So they have been in pots ten days now.

I would make sure he's watering to run off, I would start by doing a bigger run off with a low strength nutes and monitor temps they should come right, if possible he should check his run off ppms and is he phing his feed?

 

[Brettdawg]

I would make sure he's watering to run off, I would start by doing a bigger run off with a low strength nutes and monitor temps they should come right, if possible he should check his run off ppms and is he phing his feed?

He said wont they become overwatered as the football ain't developed tha much yet.

 

[needshelpguy]

He said wont they become overwatered as the football ain't developed tha much yet.

Shouldnt do if drainage is adequate I know that as soon as coco dries it releases salt or something, I had problems when i first started in coco too I would give them a decent water then wait until they damp not wet to water again. Can't use soil watering methods for coco.

 

[needshelpguy]

I also learnt on this site that overwater per say is not a thing as long as oxygen is available to the roots, plants only get overwatered when they have no oxygen to the roots, coco generally has good aeration with or without perlite compared to soil, so as long as air flow to the roots is okay, you can water as frequently as you need