Why Yellowing? Advice Needed!

[Gregzky]

Guys,
These seedlings had their first set of leaves yellow and die off which is normal. But, wtf is going on in these pics? They’re 3-4 inches tall.

 

[.Smoke]

Low Nitrogen
I'm having the exact same issue atm.
Up your (N) and give it a week.

 

[Gregzky]

Or is it overwatering ? That was my guess. I just repotted them to the same size pot, just dryer. Added dry soil as the existing soil was soaked.

What are you adding as far as N ?

 

[.Smoke]

Or is it overwatering ? That was my guess. I just repotted them to the same size pot, just dryer. Added dry soil as the existing soil was soaked.

What are you adding as far as N ?

I use General Hydroponics Flora series 3 part nutes. Was running mix to low so just upped the ml's per gallon of the nute mix.

Also dont think it's over watering due to the yellowing and brown spots. Plus my leaves come off very easily. Classic sign of N deficiency.
Over watering will have just more droopy leaves. Not as bad yellow with brown spots.

 

[RangiSTaxi]

When you have a seedling or clone, and transplant it, the lowest leaves will yellow, that is normal, the seedling/clone is drawing carbohydrates from the lower leaves to form new roots and new shoots, to focus on the new growth, if the plants new growth tip is green and growing no concern, dont try fix something. give it time to adjust and grow.

I repeat dont try fix something, nothing is broken give it time. 2-3 weeks to adjust

 

[.Smoke]

Not saying the above poster is wrong. Everything said is correct for a plant your age and what it went through.

If by chance it is low N you will know quickly. This pic is literally 1 day after I upped my N for the plant.
You can already tell she is getting greener.