First LED Grow - Seedling Leaf Color

GrowinDad

Well-Known Member
I'm posting in the LED area because this is my first full LED grow (SGS 160). Everything else is the same as I have in past grows so I am going to LED differences as my first suspect.

These gals are about ten days in the solo cups. They are barnie's pineapple chunk (which I have no grown before). Germed via paper towel then into the cups. Cups are MG Seed Starter (the only MG product I use, hate doing it but it's always worked for me) with about 30% added plain perlite (not MG with nutes). The bottom of the cups have drainage of course and the bottom 1/2" or so is straight perlite.

I looked at the roots of the largest plant and all seems good. They are starting to build up/wrap around but not badly. I was hoping to get them a bit longer in the cups before going into my 3 gal pots...

The leaf discoloration wasn't worrying me at first. It only hit the oldest leaves and I try not to think too much when they are so small. But it seems to be getting worse. Lights are about 20" away from the top of the tallest plant.

Any ideas?

Is this LED related? Cause for concern?

THX!!!


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FranJan

Well-Known Member
I had some seedlings look like that recently. I decided to use Earth Gro soil to start them instead of Happy Frog and they looked exactly like that. I put them in Happy Frog and they took off. Maybe a bad batch of MG? They look hungry and perhaps a bit over watered IMO. Good Luck.
 

GrowinDad

Well-Known Member
Damn, they seem too young to nute. I am pretty careful on watering, been every four days, slowly added until a little run off. Maybe next water I will add a little grow nute into it.

So am I hearing that no one has had anything like this from LED? Light too low or something of the sort?
 

Chronikool

Well-Known Member
I think if it was a light burn...the tops of your plantz would be affected...im not really sure as i try to stay away from both LED burns and nute burns/deficiency. :)
 

DaBotniss

Well-Known Member
What type of LED are you using. Watts? Watt bulb diode? How far do you have the light hanging from the tops. Temps?
 

GrowinDad

Well-Known Member
Area 51 SGS 160, so 3W. About 20" off the plant. Temps - haven't measured but a little cool if anything. That would be another diff vs the cfl grows prior, it is cooler. I would guess it is about 75 in the tent.
 

lax123

Well-Known Member
The leaf discoloration wasn't worrying me at first. It only hit the oldest leaves and I try not to think too much when they are so small. But it seems to be getting worse
On my first attempt, my plants looked fine and nice and suddenly the same as u discribe. It got worse and worse and they died :-( :-( I asked in the Forums, they said mag def and 100 other things nothing helped. Main theme was "as Long as new growth Looks good..". All bott died, new looked good, but then in the end it spread to the new growth -game over. Right now im doing the same again. With one difference- i figured something was wrong with my soil (too hot, too much Perlite i think -i was told like 40%) - now i use biobizz light mix -seedling soil. Its been 3 weeks, just water, since paper towel and they Show no bit of discoloration or something, just healthy green. Unfortunately i still dont know what "exactly" went wrong in my first try. But its defininetly not the leds. While all mj died, i also had tomatoes in there thriving in the same conditions. I still have them today next to my 2nd attempt now. I hope you find out whats wrong. Can i Add a noob question: this is called "seedling leaf colour" -so that whats there in the pics is not "vegging" yet. When is it- i get so confused: ppl say like "3 weeks vegging" in think omg its so big, but i dont really get when this time is starting and its not a seedling anymore (i read 5-12days) but i think it Looks older in the pics or not?
 

GrowinDad

Well-Known Member
I guess they are in veg technically. This is what has me concerned. If soil is hot vs plants hungry,cures are opposites.

I think i may transplant the largest one today into its 3 gal container with my neutral, no nute soil mix. When I moisten the soil before transplant, I will add a light regimen of nutes. I use Dyna-Gro so will go about half of week one rec on the chart. I will see how she does before moving on to the rest.

Hungry vs hot seems more likely to me only because the smallest one shows no signs and I would think hot would hurt her first.
 

DaBotniss

Well-Known Member
Still stuck on this one my friend? If soil is to hot must not be areated good.Nutes should not be hot,
3 weeks old then the ppm should be 200/300 ppms.
 

GrowinDad

Well-Known Member
I think they were hungry. I transplanted into their larger pots and used a light nute dose in my neutral soil mix. They seem to be fine and no further damage.

Aeration def not the issue as I had 30% perlite mixed in. It was either needing nutes or root bound in the solo cup. But I think it needed the nutes.

Thanks!
 
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