HELP! Leaves are turning yellow

[raffaele93]

Hi guys, it was a pleasure to be part of this community
I need help as this is my first experience.

My setup:
Category: Indoor
Light: Agro Sonlight 400W
Soil: Universal Soil Mix (pre-fertilized)
Vase: White Plastic
Outlet air: Centrifugal fan 450m3 / h
Air inlet: 2 aspirators of 200m3 / h each

The plant:
Variety: Royal Gorilla Autoflowering
Days: 27 days
Light cycle: 18-6 (light start at 17:00 and turn off at 11:00)
Irrigation cycle: 1 liter every 3-4 days
PH : 7
min/max temperature: 27° / 29°



I noticed the first symptoms 3 days ago, one leaf was starting to turn yellow and today they were almost all with this problem.
I think the problem may be caused by some fungus gnat that showed up about 1-2 week ago (I started watering less frequently without results. So Yesterday I applied a chemical insecticide to kill
the larvae (Imidacloprid), and i sprayed a solution of neem oil on the ground for the fungus gnat.
what do you think? am I doing something wrong ? Thanks in advance.

 

[crucialbunny]

Clones or seed?

 

[1Legalgrow]

Lower the PH.

 

[Rwise]

The soil is to hot! Its those time release nutes (N) in it.

 

[growell]

lower ph are u just giving water soil to strong watch they dont get root bound

 

[raffaele93]

it is a seed

 

[raffaele93]

thanks for your answer

 

[raffaele93]

thanks for the answer, I forgot to write that I added a 2-1-1 solution along with the insecticide. 2 (N) is a small amount?

 

[raffaele93]

thanks for the answer, for how much ph should i go ?

 

[growell]

anywere between 6 to7 but try for 6.5 and change it up here and there plant absords diffrent nutes better at diffrentph ido 6.4 6.7 mate wait till soil dry leaves drooping water again until gnats gone get some yellow paper put level with pot i had them neem oil should word just alternatives also put a fan level with pot stops them landing good luck

 

[Rwise]

No 2 is not hot, but with the soil already hot, even 2 can be to much. Can you repot into larger pots with calmer soil?

 

[Canuck147]

This is what I think - your soil looks like bark mulch - which cannabis plants dislike - it has nothing to aerate the soil - needs perlite.

White plastic pots are third rate - fabric pots are desired.

The plants can't grow any faster no matter how many chemicals you dump on them.