Leaves yellowing on young plants

[jebemtimojozemlo]

It's been around 14 days since I put the seeds in and the plants came out about 9 days ago and one plants leaves started to yellow. They were strecthing a bit at the beginning so I moved them closer and now they seem to be fine (besides the obvious). I'm using a 600w HPS growlight (for the first time), the temps are around 28°C I know it's a bit high and I am trying to lower them, havent used fertilesers yet and pH is 5,7-6,2. My biggest suspects are that its too hot or underwatering but i dont wanna mess up by doing something that might do even more damage. So if there is anyone who knows whats wrong please tell me. Thanks in advance! (The photos are so dark because its the best how i could get them without the leaves being too shiny)

 

[Madmax]

Yeah id say your lights killing it .could b a few things.id move it way up .how close you got it..

 

[jebemtimojozemlo]

Yeah id say your lights killing it .could b a few things.id move it way up .how close you got it..

Right now they are about 75cm away.

 

[Flexnerb]

When starting seeds and/or clones you shouldn't start them out in big pots...start in solo cups!

Or 300ml sized seedling container....

Never use HPS for seed starts or anything in veg..

What type of growing medium are you using?

 

[jebemtimojozemlo]

When starting seeds and/or clones you shouldn't start them out in big pots...start in solo cups!

Or 300ml sized seedling container....

Never use HPS for seed starts or anything in veg..

What type of growing medium are you using?

um its some dirt my local growhouse sells i bought it when i bought everything else

 

[No3r]

It’s not the light. It’s not getting the nitrogen it needs which is causing it to yellow. The seedling itself has enough food within itself to sustain life for a bit, looks like its time to add amendments

 

[Porky1982]

It’s not the light. It’s not getting the nitrogen it needs which is causing it to yellow. The seedling itself has enough food within itself to sustain life for a bit, looks like its time to add amendments

Yeah ide agree with the above.

 

[a4twenty]

agree with above and as a side note 5.7 is too low for a soil grow. you're aiming for 6.0 - 7.0, preferably 6.3 - 6.7 or around 6.5.

you dont need to bring the light closer at this stage, seedlings dont need as much as established plants. and be careful watering such small plants in such large containers (relative too plant size), its easy to over water

 

[jebemtimojozemlo]

OK thanks for all the help I added some nitrogen. But when I was away situation has gotten worse, also whats weirding me out is that the other one is fine and they are growing in the same conditions

 

[No3r]

OK thanks for all the help I added some nitrogen. But when I was away situation has gotten worse, also whats weirding me out is that the other one is fine and they are growing in the same conditions

Keep it moist, don’t saturate for now.

 

[Flexnerb]

um its some dirt my local growhouse sells i bought it when i bought everything else

You need more drainage material in that pot

Pumice or perlite, chunky.

Dig that plant out of that big pot and put it in a solo cup! Lmfao

 

[GNick55]

i think your soil has too high nutrients for a young seedling..
a seedling needs No nutrients until the two small cotyledon round leaves die on their own, than start tiny doses..