11 days old seedling lower leaves yellowing. Dying?

  • Thread starter giotto420
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giotto420

giotto420

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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).
 
0 02 05 aa854598893a3fd6a2c9bff653eb9b0d01918698a3601edc1b57aa6e5274ce66 57c6594e1600dc35
0 02 05 fb2cde11603ecd7719a0d4e6ef44f75ad0537916aa1c12c903b0715fb4e802d8 e39c08113a884cd8
mysticepipedon

mysticepipedon

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I think you're overwatering and killing the roots. BTW, cannabis doesn't need to be misted.

Normally I would say stay away from soil with nutrients for seedlings, but since this only started 3 days ago, I'm not sure that is the problem.

How often does your "finger test" tell you to water?
 
Aqua Man

Aqua Man

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You need much deeper cups. Its over watered and as was said dont mist the plants.

How far away are the bulbs?
 
giotto420

giotto420

9
3
You need much deeper cups. Its over watered and as was said dont mist the plants.

How far away are the bulbs?
I planned to transplant as soon as it grew 4-5 nodes. I know it's not recommended for autos but I have seen it succeed.
  • Light distance: around 5cm from plant
I think you're overwatering and killing the roots. BTW, cannabis doesn't need to be misted.

Normally I would say stay away from soil with nutrients for seedlings, but since this only started 3 days ago, I'm not sure that is the problem.

How often does your "finger test" tell you to water?
Yes, I learned that my soil is not really suitable for it but kinda late (as I have bought it already) and decided to give it a try. I have read on some forums that while it may stunt the growth, the nutrient rich soil will not kill the seedling.

I'd say every day or two max was needed to get it dry. And as I said, I don't think I was overwatering it because I was just spraying it few times (on the leaves and the soil). Didn't do it till runoff.

I agree that it's probably a root problem though... today I watered it till runoff with pH balanced water and left it alone. I think I may be messing too much with it trying to improve it and accomplishing the exact opposite...
 
Aqua Man

Aqua Man

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I planned to transplant as soon as it grew 4-5 nodes. I know it's not recommended for autos but I have seen it succeed.
  • Light distance: around 5cm from plant

Yes, I learned that my soil is not really suitable for it but kinda late (as I have bought it already) and decided to give it a try. I have read on some forums that while it may stunt the growth, the nutrient rich soil will not kill the seedling.

I'd say every day or two max was needed to get it dry. And as I said, I don't think I was overwatering it because I was just spraying it few times (on the leaves and the soil). Didn't do it till runoff.

I agree that it's probably a root problem though... today I watered it till runoff with pH balanced water and left it alone. I think I may be messing too much with it trying to improve it and accomplishing the exact opposite...
Wow Move the bulbs back to about 30-40 cm

Transplant in a solo cup and fill to the top with soil
 
growsince79

growsince79

8,574
313
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).
Too much light. 16-8 @20cm would be about right.
 
giotto420

giotto420

9
3
Too much light. 16-8 @20cm would be about right.
Hmm. It's weird that most sources on google (forums as well as sites), recommend keeping it as close as possible (if the temps are in check) hence why I kept them that close. My temps were never going over 28. And considering my wattage (69W total), I thought it would be okay to keep them that close. Any thoughts on this?
 
Aqua Man

Aqua Man

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Hmm. It's weird that most sources on google (forums as well as sites), recommend keeping it as close as possible (if the temps are in check) hence why I kept them that close. My temps were never going over 28. And considering my wattage (69W total), I thought it would be okay to keep them that close. Any thoughts on this?
My thoughts…. Google is wrong
 
growsince79

growsince79

8,574
313
Hmm. It's weird that most sources on google (forums as well as sites), recommend keeping it as close as possible (if the temps are in check) hence why I kept them that close. My temps were never going over 28. And considering my wattage (69W total), I thought it would be okay to keep them that close. Any thoughts on this?
I always use 6500k cfl for seedlings. google is wrong. Every plant is different- 8" is a good starting place. As they get more roots they can handle more light. Mine get about 10-12k lux @ 11 days.

Day 12
 
IMG 20220630 132956152 HDR2
Last edited:
Oldchucky

Oldchucky

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1,506
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Robt Is probably not kidding! Probably had to wear the equivalent more than a few times. Keep fighting the good fight brother!
 

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