New Grower Sun burn or nute deficiency??

[Rocky]

Hi guys,

Yet another question about "what's wrong with my plant" so first off sorry for that

However, I'm stumped....

These are Big Devil XL autos

Nearly two weeks old from sprouting

Under 600w HPS from the start (hence why im wondering if its radiation burn) with intake and oscillating fans. Temps averaging between 28C and 30C. 20/4 light cycle

Grown in canna coco in 15L airpots

Watered every couple of days and misted a couple of times a day with pH 6.6 water

These little things look extremely yellow compared to my other strains and previous experience. They don't have spots or marks, no curling of edges or wilting yet the yellowing also makes me think it could be something like nitrogen deficiency.

Also they look a little short and lacking in growth compared to some other grows at around two weeks.

So I figured I'd ask for an opinion before I start throwing some nutes at it....

Any ideas welcomed and appreciated..

 

[TaNg]

Hay bro its a PH issue as coco needs to be fed as a hydro NOT soil so aim for 5.8

Also coco has no nutrients so you need to feed from the start.

 

[Rocky]

Thanks! Had heard this but thought it surely wouldn't have been too much of an issue, apparently I was wrong! Appreciated!

 

[TaNg]

Thanks! Had heard this but thought it surely wouldn't have been too much of an issue, apparently I was wrong! Appreciated!

We have a whole section dedicated to coco growing bro you should swing by https://www.autoflower.org/f126/ also pop over to the intros section so you can introduce yourself.