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Are my seedlings toast?!

WizWaz
(@wizwaz)
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First time grower - Autoflowing seeds, grown in soil, in propagator from germination in natural light and looking healthy with the first two 'proper' leaves growing well.

Put them in the grow tent, 600w LED light, for the first time last night and I think I've burnt them, the canna leaves have gone yellow.  I've given them a water and placed back in the propagator for now. 

The lamp was  approx 10" above, as per a guide I've read with a very low extractor setting.

 

Any help appreciated - Is there an Autoflower specific guide? Or does anyone have a link? 

 

TIA, Waz

c1
c2
c3
c4

  

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Topic starter Posted : December 14, 2021 12:46 am
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monkeydo
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Posted by: @wizwaz

The lamp was  approx 10" above, as per a guide I've read with a very low extractor setting.

I would be suspicious of this number. It would have to be an extremely gentle dimmed led to have a seedling that close mate. Most leds I’m used to using/seeing recommend the light to be 20-28 inches for seedling depending on the power. What is the make and model of the light. Most manufacturers publish PAR maps that can help you determine what height you should be at each phase of plant life.

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Posted : December 14, 2021 1:29 am
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WizWaz
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@monkeydo 

 

Hi,  The lamp is an undimmable model, Mars Hydro TS600 that came in a kit, I've attached a pic for description,

lamp

 

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Topic starter Posted : December 14, 2021 1:39 am
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im_sparky
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Posted by: @monkeydo
Posted by: @wizwaz

The lamp was  approx 10" above, as per a guide I've read with a very low extractor setting.

I would be suspicious of this number. It would have to be an extremely gentle dimmed led to have a seedling that close mate. Most leds I’m used to using/seeing recommend the light to be 20-28 inches for seedling depending on the power. What is the make and model of the light. Most manufacturers publish PAR maps that can help you determine what height you should be at each phase of plant life.

What is a good PAR for cannabis seedlings?  Been wondering this myself recently. Thanks in advance.

To see a World in a Grain of Sand, And a Heaven in a Wild Flower,
Hold Infinity in the palm of your hand, And Eternity in an hour.
― William Blake

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Posted : December 14, 2021 1:56 am
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monkeydo
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For seedlings I go 250-300 PAR. Here’s a chart that works pretty good for me.

CA09CD1C 8A78 4527 9863 A4120F5DB648

 Based on the par maps you posted I’d put that light at 24 inches above the young seedlings. If they start to stretch excessively towards the light lower it to 20 inches. Let your seedlings stabilize a bit then give them another shot with the light at 24” above.

We’ve all done these things before brother. It’s just a learning process we all go through. You got this and Percy’s is with you.

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Posted : December 14, 2021 2:15 am
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Rufio
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CBCEB4C3 7961 4DA5 BE32 ACD204678861

says similar in the handbook came with mine too 👍🏻

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Posted : December 14, 2021 6:18 pm
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Macky
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Posted by: @rufio
CBCEB4C3 7961 4DA5 BE32 ACD204678861

says similar in the handbook came with mine too 👍🏻

You got that HLG light yet mate?


"Keep away from people who try to belittle your ambitions. Small people always do that, but the really great make you feel that you, too, can become great.”
― Mark Twain

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Posted : December 14, 2021 6:41 pm
monkeydo, Zombie Nation, WoodI2 and 4 people liked
Podge_85
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@wizwaz hey , do you have a lux or a par meter , so you can see how strong the light is at that same distance , that that plants where under 👍 this is an app I use to measure my lights 🙂 

Screenshot 20210623 065553 Google Play Store

 

 

Always look on the bright side of life 🥦🍄🇮🇪

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Posted : December 14, 2021 6:54 pm
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Rufio
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@macky arrived today, will get it in the tent at the weekend and pics to follow 🤩

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Posted : December 14, 2021 7:48 pm
monkeydo, Zombie Nation, WoodI2 and 5 people liked
Macky
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@rufio Epiiicc!!! Cant wait to see it mate Smile Well done 


"Keep away from people who try to belittle your ambitions. Small people always do that, but the really great make you feel that you, too, can become great.”
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Posted : December 14, 2021 8:03 pm
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DiscoBiscuitt
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Could be hot soil bro, what you using? 

♥️💛💚

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Posted : December 14, 2021 8:18 pm
monkeydo, Zombie Nation, WoodI2 and 3 people liked
DiscoBiscuitt
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@rufio Yea boiiiiiii, fire that beast up you lucky fucker. 

♥️💛💚

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Posted : December 14, 2021 8:40 pm
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