Veg stage / seedlings yellowing stumped growth

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Tob522

Member
My seedlings are yellowing some are gripping down but others twisting up.

it was hitting 33 under 4 x400 hps so I’ve just turned them down to 250.

ihad them under a t5 for two weeks prior.

they have been in here a week just done a light mix of ph water at 1.3 nut mix

is it the heat and is there a way to claw back?

thanks
 

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BigBudsNPK

Member
Holy hell! That's like killing a unicorn with like... a bomb. If I had to run your equipment I would have used one light placed further away... but then the stretch. You need a different light for veg to get them ready for HPS Armageddon.
 
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Tob522

Member
BigBudsNPK said:
Holy hell! That's like killing a unicorn with like... a bomb. If I had to run your equipment I would have used one light placed further away... but then the stretch. You need a different light for veg to get them ready for HPS Armageddon.
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You recon turn them down to 250 or just put the t5 back in?

and start again or revive?

cheers
 
buyyouabeer

buyyouabeer

Well-Known Member
Do they ever get a dry cycle; looks pretty damp? Small plants in large containers. Yellowing can be from root rot and I see some necrosis on your leaves. Normal light picture would help.
 
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BigBudsNPK

Member
Tob522 said:
You recon turn them down to 250 or just put the t5 back in?

and start again or revive?

cheers
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Nah you were definitely ready to step up the T5 but 50w to 1,600w is too much of a leap. You want about 500-600par which is achievable at different wattages and heights. With led you can put the lights within 6in no problem and get the par you need at a heat they can tolerate.

All that light made them transpire too quickly and absorb too many nutrients. I would start over personally, but I know some people would try to fix it to not waste the time and effort.
 
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Tob522

Member
buyyouabeer said:
Do they ever get a dry cycle; looks pretty damp? Small plants in large containers. Yellowing can be from root rot and I see some necrosis on your leaves. Normal light picture would help.
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No the pots sit in trays and use a valve to fill up the water when it’s low, I think they’re supposed to take what they need, similar to the iws system!

I’ll get some day pics
 
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Tob522

Member
BigBudsNPK said:
Nah you were definitely ready to step up the T5 but 50w to 1,600w is too much of a leap. You want about 500-600par which is achievable at different wattages and heights. With led you can put the lights within 6in no problem and get the par you need at a heat they can tolerate.

All that light made them transpire too quickly and absorb too many nutrients. I would start over personally, but I know some people would try to fix it to not waste the time and effort.
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I see what you’re saying I didn’t really think about the combine wattage more to what was above the plants!
 
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BigBudsNPK

Member
Tob522 said:
I see what you’re saying I didn’t really think about the combine wattage more to what was above the plants!
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It's not the simplest thing growing this herb, but just remember that a mistake is only a mistake because you've now learned the truth. ︎
 
Doggonewild

Doggonewild

Well-Known Member
Way to big a pot way to much much light use t5 till Atleast two or three foot of vegetation seriously bro calm down use those hps when ur like holy f this thing is getting big and is pretty as f then its time for the beast btw u will never need four 400s in that small room maybe at most two 600s or one 1000 on a mover i say growing weed is like cooking never cook on a empty stomach never grow unless u already stoned dont think its gonna happen over night its a long process even after its ready to cut u gotta wait dry cure etc id suggest starting over much love brother ive been there myself
 
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