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).
 
11 days old seedling lower leaves yellowing dying
11 days old seedling lower leaves yellowing dying 2
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
Aqua Man said:
You need much deeper cups. Its over watered and as was said dont mist the plants.

How far away are the bulbs?
Click to expand...
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
mysticepipedon said:
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?
Click to expand...
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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638
giotto420 said:
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...
Click to expand...
Wow Move the bulbs back to about 30-40 cm

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

Aqua Man

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638
Its not your soil thats the problem. Its how shallow those cups are

Read this.

www.thcfarmer.com

Marijuana Watering, how media, pot size/shape and environment affect it

Ok lots of posts on how to water plants. So I thought I would put together a thread on how different factors contribute to different results that ppl see. This will be a long read based on my personal knowledge, opinions, research and others work to consolidate information for our members. I'm...
www.thcfarmer.com www.thcfarmer.com
 
growsince79

growsince79

9,065
313
giotto420 said:
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).
Click to expand...
Too much light. 16-8 @20cm would be about right.
 
giotto420

giotto420

9
3
growsince79 said:
Too much light. 16-8 @20cm would be about right.
Click to expand...
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

26,480
638
giotto420 said:
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?
Click to expand...
My thoughts…. Google is wrong
 
growsince79

growsince79

9,065
313
giotto420 said:
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?
Click to expand...
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

Supporter
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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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