Light burnt seedlings

[Loner]

Hello everyone,

I started my first everygrow with LED lights, and unfortunately I had my lights to close. These seedlings are now 10 days old, and but showing much signs of recovery. I'm wondering if I should just scrap them, and just start over?

Thank you.

-Problem: light burn seedlings
-Medium/grow method: 50/50 coco/perlite
-Feed and supplements used: 200 ppm of sensi grow coco a/b
-Water source: RO
-Strain and age: mango smile and auto blue mazar 10 days
-Climate: Day temp/rh 75/70. Night temp/rh 70/65
- Light used: 400w 301b dimmed to 200w
-Additional info: found the issue about 4 days after sprout and moved the lights up/checked ppfd. No growth since l. That do start a lot more yellow in person vs the picture

 

[blue]

Hello everyone,

I started my first everygrow with LED lights, and unfortunately I had my lights to close. These seedlings are now 10 days old, and but showing much signs of recovery. I'm wondering if I should just scrap them, and just start over?

Thank you.

-Problem: light burn seedlings
-Medium/grow method: 50/50 coco/perlite
-Feed and supplements used: 200 ppm of sensi grow coco a/b
-Water source: RO
-Strain and age: mango smile and auto blue mazar 10 days
-Climate: Day temp/rh 75/70. Night temp/rh 70/65
- Light used: 400w 301b dimmed to 200w
-Additional info: found the issue about 4 days after sprout and moved the lights up/checked ppfd. No growth since l. That do start a lot more yellow in person vs the picture

Looking okay to me .. just a little small and behind schedule!
I'm not seeing light burn .. thay typically bleaches the buds when they're too close.

Is your pot on a cold floor? - everything else in the description looks good - I'm not sure where 200ppm puts you, but i would feed coco with a minimum EC of 0.8 - (some people disagree with me ... and i don't use coco anymore, but had success in the past)

It's usually temps that slow them down . (could be rootzone temps and not air temps)

Hope this helps
Blue ^_^

 

[Loner]

Looking okay to me .. just a little small and behind schedule!
I'm not seeing light burn .. thay typically bleaches the buds when they're too close.

Is your pot on a cold floor? - everything else in the description looks good - I'm not sure where 200ppm puts you, but i would feed coco with a minimum EC of 0.8 - (some people disagree with me ... and i don't use coco anymore, but had success in the past)

It's usually temps that slow them down . (could be rootzone temps and not air temps)

Hope this helps
Blue ^_^

Thank you for they reply. They are raised on a plastic grate.

I say I believe it's light burn, because when I came back, they were mostly yellow. They were receiving 700-800 ppfd. They do look a lot more yellow in real life, than in the picture.

The only reason I'm thinking of scraping it, is because I've never seen 0 growth over a 7 day period. I really don't want to pay for all this electricity and nutes and end up with a severely diminished yield. I've also never grown an autoflower, and I don't know what length of time it'll have before it flowers.

Edit Do you think the ppm would affect the growth at this point much? I believe 200ppm is .04 EC based off my pen. They haven't really even tapped into the cotyledon yet. I'll try upping the EC if nothing changes soon. So, I think I'll invest in a warning pad and thermometer for the dirt. Thanks again

 

[Bill.de.Cat]

Thank you for they reply. They are raised on a plastic grate.

I say I believe it's light burn, because when I came back, they were mostly yellow. They were receiving 700-800 ppfd. They do look a lot more yellow in real life, than in the picture.

The only reason I'm thinking of scraping it, is because I've never seen 0 growth over a 7 day period. I really don't want to pay for all this electricity and nutes and end up with a severely diminished yield. I've also never grown an autoflower, and I don't know what length of time it'll have before it flowers.

Edit Do you think the ppm would affect the growth at this point much? I believe 200ppm is .04 EC based off my pen. They haven't really even tapped into the cotyledon yet. I'll try upping the EC if nothing changes soon. So, I think I'll invest in a warning pad and thermometer for the dirt. Thanks again

You haven't said how big your pots are...At this stage most the growth is going into building up a root system that can sustain growth on the top later....Bigger pot, longer to establish the roots....

 

[Loner]

You haven't said how big your pots are...At this stage most the growth is going into building up a root system that can sustain growth on the top later....Bigger pot, longer to establish the roots....

Sorry, they're all directly seeded into 5 gallon fabric pots.

 

[Bill.de.Cat]

They look OK, don't notice any light burn or nute burn or anything detrimental so far....I'd run em....could be slow genetics, too cool for them, or a myriad of other reasons. At 10 days I'd not worry, at 20 I'd start to worry at 25 I'd start a new batch if they are still the same.

 

[blue]

Thank you for they reply. They are raised on a plastic grate.

I say I believe it's light burn, because when I came back, they were mostly yellow. They were receiving 700-800 ppfd. They do look a lot more yellow in real life, than in the picture.

The only reason I'm thinking of scraping it, is because I've never seen 0 growth over a 7 day period. I really don't want to pay for all this electricity and nutes and end up with a severely diminished yield. I've also never grown an autoflower, and I don't know what length of time it'll have before it flowers.

Edit Do you think the ppm would affect the growth at this point much? I believe 200ppm is .04 EC based off my pen. They haven't really even tapped into the cotyledon yet. I'll try upping the EC if nothing changes soon. So, I think I'll invest in a warning pad and thermometer for the dirt. Thanks again

No worries - yeah, i think yellowing seedlings is usually down to either PH problems, or lack of food problems.
I'd be PHing to 5.8, with an EC of 0.8-1.0 (veg nutes) for a nice green colour!

As far as scrapping - i do believe that the first 20 days of an autos life is the most important thing to nail down. But it's always grow choice when to pull the trigger!

here's what i expect 5 day olds to look like in my setup

and here's the same plants at 11 days (same setup)

 

[Loner]

They look OK, don't notice any light burn or nute burn or anything detrimental so far....I'd run em....could be slow genetics, too cool for them, or a myriad of other reasons. At 10 days I'd not worry, at 20 I'd start to worry at 25 I'd start a new batch if they are still the same.

Sounds good. I appreciate your time and advice.

 

[Bill.de.Cat]

No worries - yeah, i think yellowing seedlings is usually down to either PH problems, or lack of food problems.
I'd be PHing to 5.8, with an EC of 0.8-1.0 (veg nutes) for a nice green colour!

As far as scrapping - i do believe that the first 20 days of an autos life is the most important thing to nail down. But it's always grow choice when to pull the trigger!

here's what i expect 5 day olds to look like in my setup

and here's the same plants at 11 days (same setup)

Showoff...

 

[Loner]

No worries - yeah, i think yellowing seedlings is usually down to either PH problems, or lack of food problems.
I'd be PHing to 5.8, with an EC of 0.8-1.0 (veg nutes) for a nice green colour!

As far as scrapping - i do believe that the first 20 days of an autos life is the most important thing to nail down. But it's always grow choice when to pull the trigger!

here's what i expect 5 day olds to look like in my setup

and here's the same plants at 11 days (same setup)

Those are looking great! That is what I was hoping to see. Both you and Bill.de.Cat have suggested .08EC I'll definitely boost them a bit the next watering. Thank you
Edit: is that an autopot? I've actually got the round fabric versions for this grow. I'm itching to get them in there.