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COCO COIR 3 of my plants with different symptoms, HELP NEEDED

Even if you are only giving them 1/4 strength nutes, the yellowing will not happen over night AS LONG as the pH is in range.

I seems you are doing the right thing, however I would urge you to try and get a handle on KNOWING exactly what your pH is as I am willing to bet that is 99.9% of all problems new growers have. Once you can speak that language, everything else is easy to pick up on..:)
 
Here are my plants repotted.

pH was ~6 with 2mL Bio-grow and 1mL Alg-a-Mic.

I have also put pictures of the 600w LED that I will install this weekend.
 

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Nice, how close do you have that light? I would start out at least 2' (feet) away as you can always lower a bit tomorrow and the next day..:)

When your feeding her, make sure to get some close to where the root zone is at first and just beyond and they will start taking off..

Very Nice..
 
Sockfilter Then I will need to raise the light from 1/2 foot. Actually around 45cm away from top. Keep in mind it is only a 45w crappy LED. The next one will be a whole different story 😎!

Temp is 23 degrees Celsius and RH 52%. All good like this?
 
Sockfilter Something went wrong. LED was much closer than 2’ away, it was more like 1/2’ away... I raised it now to 2’ high. And I suspect fan was blowing too strongly directly on the plants. It looks like some leaves have turned almost crispy 😵😱!
 

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Yes those are fine. Little low for lights on but nothing to worry about. The only thing that it will really effect is the internodal length.
 
I definitely think they got wind-burned by the fan blowing directly on them, only the furthest away hasn’t been affected.

Maybe also some nitrogen deficiency for the smallest one? (Lower leaves turning yellow)
 
How long did you have that LED 1/2 inch away, HOLY buckets batman...lol, That is the crispy issue I would suspect.. 2 feet away at least.. And yes as the others have said, DONT have the fan directly blowing on them right now, let some breeze bounce off a tent wall and wisp them a bit, just a little jiggle in the plant is all you are looking for, no kite flying, hurricane, tornado winds..:)

You will be fine, just keep close eye on them for next few hours as you changed up a heap of things at 1 time, gotta make sure no other issues..:)
 
Just came back from work. Things are looking nasty for #2 and #3 (the ones that were closer to the extra fan I added yesterday). Without looking completely dry, they both look like they are drying up and clawing 😰. I think the roots were damaged when I transplanted (I will definitely never use those tapered coco pots again, peripheral roots seemed to be stuck to the pot!!).

#1 is doing perfectly fine (I don’t know if I should say perfectly, but no signs of stress whatsoever).

Any recommendations for #2 & #3? Shall I cut off lower/dryer/yellower leaves or let it be for the time being and see how they progress?
 

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I had a sneaking suspicion it was the pots. So they were pretty rootbound then. Just give them time it will take a little bit to recover. Just sing to them real close (theyll love the extra co2 from your exhale) and do what you can to make them happy and comfortable.
 
I wouldn't say "nasty" looking, have seen much worse with great recovery.. Like UrbZ said, keep an eye on them, let them do their thing and give them some TLC. They are having to get use to new pots, new light and air movement. So I think they are doing good for all the recent changes.
 
Guys, I already give them all the love and affection I can. Now I would like you to give me a more scientific approach to what is happening to my loved and tendered plants 😁😂.
 
I'm not a scientist, however anything in nature that is uprooted, given a different home, different environment tends to be a little droopy at first. Didnt you just take them out of a humidity dome with probably warmer, humid temps with no breeze, transplanted from peat pot with some broken roots, went from CFL to 600w LED and circulation fan?

Good night, I am stressed from just thinking about it..:) lol.. Be patient..:)

That's about as scientific as I can get..haha
 
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