Help! What does this mean?

[KARDIOGOD]

Hey there, so, 2 of my tiny seedling leaves turned yellowish! They are 12 day old and barely grew too!

Im using coco-perlite and they all in a 3gal each
Im using 400 hps bulb that is 1 meter away from them+a cool head, and when i put my hand at plants level its not hot.. temp is 28C° and humidity is at 40% to 50%..
What could cause this?? I feel like they're stunt!

 

[coreywebster]

3gal is a big pot for tiny seedlings so you need to make sure your not over watering. But those baby leaves are food for the plant and when they start yellowing its time to introduce some nutrients. Go steady and don't give them a full dose.
You can probably lower that light a foot too.
What nutrients do you have?

 

[KARDIOGOD]

3gal is a big pot for tiny seedlings so you need to make sure your not over watering. But those baby leaves are food for the plant and when they start yellowing its time to introduce some nutrients. Go steady and don't give them a full dose.
You can probably lower that light a foot too.
What nutrients do you have?

I have BioBizz series (Bio-grow, Bio-Bloom, Top-Max, Root-juice, Bio-Heaven)and i also have Solution Silicon Nutrient

 

[coreywebster]

Get them fed then next time you water. Follow the biobizz nutrient calc and use a half dose of what is suggested for seedlings.

 

[KARDIOGOD]

Get them fed then next time you water. Follow the biobizz nutrient calc and use a half dose of what is suggested for seedlings.

Thenx!
Also in your opinion are they small for 12 days old?

 

[coreywebster]

Thenx!
Also in your opinion are they small for 12 days old?

Maybe a little small. Nothing major. They will be rooting out been in bigger pots. I'm guessing they are autos or you would of potted into Dixie cups or something smaller

 

[KARDIOGOD]

Maybe a little small. Nothing major. They will be rooting out been in bigger pots. I'm guessing they are autos or you would of potted into Dixie cups or something smaller

Actually they're not autos, they are reg feminzed and their flowring says 9 weeks.
I'm a lil worried cause i saw 12 days old who were a lot progressed

 

[coreywebster]

Actually they're not autos, they are reg feminzed and their flowring says 9 weeks.
I'm a lil worried cause i saw 12 days old who were a lot progressed

Ah well you may be better potting into smaller containers next time you pop some seeds. Its just easier.
Don't worry, they just need some food and they will soon start to really grow. Make sure your temps are not too cold by taking temp measurements from the correct place and your ph doesn't vary too much.

 

[Underground Ops]

Agree them baby's are probs ready for some nuits.

 

[KARDIOGOD]

So I added some nutes. Added 1/4 of root juice, bio heaven, bio grow and sillica...
2 of my babies turning yellow by the day! And one have tiny black dots on him... They are 15 days old and barely no growth..