Please help me narrow down problem

So I’ve recently starting see some yellowing coming in I’m I’ve been looking it up I think it’s a sulfer or light stress problem or under watering so I’m using coco in 5gallon pots under 600hps roughly 24-28 inches and watering every 6days in coco with flora trio and using there feeding chart on the bottle the yellowing is only at the top of the plant not near the bottom of the plant the pics I’ve put are as lights was going off but the feel dry to touch and I feel my growth has slowed please help me narrow it down


Also ph 5.9 in coco

Watering to infrequently causes spikes in the ec and ph in coco.

Looks severely underwatered. I'm not a coco guy, but that seems like a big pot and far too long between watering.

Start here ( link )


I don’t feel like typing a long drawn out answer , so follow link. I suggest you know how coco growing operates before using it.
Issues are from Grower Error.

So you guys would go with underwatering? @Hashpants @cannabiscrusader

Budzbuddha said:

Start here ( link )


I don’t feel like typing a long drawn out answer , so follow link. I suggest you know how coco growing operates before using it.
Issues are from Grower Error.

Click to expand...

Thanks I just had a read i just actually learnt something from that

Click the link @Budzbuddha posted. But yes, among other things

cannabiscrusader said:

Click the link @Budzbuddha posted. But yes, among other things

Click to expand...

Thanks so much for all you guys input

This is your third thread regarding the same problem and you've gotten good advice.
Yellowing?
Are my plants starting to yellow week 4 veg (clone)
Read some of the replies in your other threads for your answer.

I'll repeat my post in your other thread.......Coco is drain to waste hydroponics........not soil.
Feed at least once to twice per day to substantial run off.
Never plain water.

MickFoster said:

This is your third thread regarding the same problem and you've gotten good advice.
Yellowing?
Are my plants starting to yellow week 4 veg (clone)
Read some of the replies in your other threads for your answer.

I'll repeat my post in your other thread.......Coco is drain to waste hydroponics........not soil.
Feed at least once to twice per day to substantial run off.
Never plain water.

Click to expand...

Yh my bad I saw this and I’m unable to watch 2-3 times a day I was there today and I gave a nice feed till I had run off so hopefully it does it but on my other post it’s just you replying I’m stressing over here

MickFoster said:

This is your third thread regarding the same problem and you've gotten good advice.
Yellowing?
Are my plants starting to yellow week 4 veg (clone)
Read some of the replies in your other threads for your answer.

I'll repeat my post in your other thread.......Coco is drain to waste hydroponics........not soil.
Feed at least once to twice per day to substantial run off.
Never plain water.

Click to expand...

Also this is my 4th run never had a problem and never use plain water with coco but I was letting it dry out and on the feed that @Budzbuddha post it said you shouldn’t let it dry out

Keep reading. I've been reading since I saw it posted, and I'm not a slow reader