11 days old seedling lower leaves yellowing. Dying?

[giotto420]

Some info:

• Soil - xpert nutrients microbial mix
• Lights - 20:4 from germ / 3 x 23W 6500K CFL
• Light distance: around 5cm from plant
• Watering: pH balanced water with spray bottle as soon as the top of the soil (finger test) is dry, sprayed the leaves sometimes
• Fan blowing breeze air above the plant (and slightly blowing the plant as well)
• Age: 11 days
• Temps: 25 - 29 Celsius max, was trying to keep it on the lower side
• RH: 45%-55%

First few days were very good - vigorous growth. Then, 3 days ago, it stopped growing. There were days where I could see the leaves drooping which I attributed to overwatering so I skipped a day of watering before continuing.
Then, lower leaves started yellowing. Soon, in a day, they completely yellowed and the top leaves started yellowing as well.

I know that the plant will probably die but I am wondering, what did I do wrong?
Could watering too often (and misting the leaves directly) have been the cause?
What should my next course of action be?

I attached some pics below. (the July is a typo, it should have been June).

 

[bam0813]

If you’ve just been misting the top id say under watered. If you soaked it then kept spraying when surface dry, then over. Yellowing up in a single day is odd points to roots imo. Not familiar with nutrition of media but your cups half full.

 

[bam0813]

Your dates are confusing im thinking june 29 then you filled it up?

 

[giotto420]

If you’ve just been misting the top id say under watered. If you soaked it then kept spraying when surface dry, then over. Yellowing up in a single day is odd points to roots imo. Not familiar with nutrition of media but your cups half full.

It looked to me like the roots were the problem as well. Maybe root rot? And for the cup, I filled it fully but too late now for changes anyway. I plan to just leave it as is and see if by any chance it can survive.

Your dates are confusing im thinking june 29 then you filled it up?

As said at the end of my post, 29 June is the first picture and today (30th) I filled it up fully with the soil, but I don't think that was the cause of the problems..

 

[bam0813]

Sorry missed the correction

 

[Herb & Suds]

Not root rot
More likely damage done transplanting or handling of seed
Sometimes they never recover

 

[giotto420]

Not root rot
More likely damage done transplanting or handling of seed
Sometimes they never recover

But it was not transplanted... I directly put it into that container. Could be the soil being too strong for it but I doubt that was it.

 

[xXairwolfXx]

I would suggest to check the PH of the soil first. Should be around 6.5 max 7.0 If the PH is correct then probably nutrient burn from over watering. Flush the soil with PH stable water or rainwater would do the trick. And btw do you have drainage at the bottom of your container? Get some worm castings it protects your plants roots from nutrient burn.

 

[Herb & Suds]

But it was not transplanted... I directly put it into that container. Could be the soil being too strong for it but I doubt that was it.

I just checked your "xpert nutrients microbial mix" it had too much nitrogen for such a young plant

That is what their light version is for

To much nitrogen to early

 

[Liamp1603]

I would suggest to check the PH of the soil first. Should be around 6.5 max 7.0 If the PH is correct then probably nutrient burn from over watering. Flush the soil with PH stable water or rainwater would do the trick. And btw do you have drainage at the bottom of your container? Get some worm castings it protects your plants roots from nutrient burn.

This happened to me … using a product that was told fine for seedlings and young plants but it’s burned them really bad I swapped to inert coco instead and after 24 hours they’re already looking better

 

[Rurumo]

Try raising the light up a bit

 

[Kerowacked]

Give her a good drink and walk away for a week. Misting the soil is like opening the hot tub for gnats.

 

[Budzbuddha]

Looks like seedling is not liking the medium too much.
Not sure what other soil alternatives you have.

That brand seems to be a “ boutique “ mix …. With marketing claims. Believe it or not there are basic bagged mixes that would work as good or better - without “ boutique/ gourmet “ BS pricing.

 

[nonamedman420]

This happened to me … using a product that was told fine for seedlings and young plants but it’s burned them really bad I swapped to inert coco instead and after 24 hours they’re already looking better

Seedlings have enough nutrients int heir seed/cotyledons for it to be grown in inert media until their first set of true leaves.