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Old 07-31-2020, 03:08 AM #11
Clayton_Bigsby
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**UPDATE**

So today is Day 15. I still can't find out whats wrong with them. They have a weird wilt where it's less of a wilt and more of the leaves just turning downward. Some of the plants are also yellowing, especially the bottom leaves.

As of yesterday, I transplanted them just to switch the soil up and see if they respond. It's a pretty hot mix so i figured they're either going to respond well or get burnt to a crisp. Im using DankFranks bed soil mix linked here (its at the bottom of the first page of the thread):

https://www.icmag.com/ic/showthread.php?t=258168


I was very surprised to see they all had well established root systems for 2 weeks in the 4 inch pots which leads me to believe the soil isn't the problem.

I initially turned my CO2 down but got no results so as of yesterday I turned it completely off. I also added an intake and outtake to exchange the air in the room 4 times a day. I read some people having problems with CO2 running need air exchange. Kind of debated but i figured it can't hurt and now ill have a backup incase my mini split dies.

As i mentioned earlier Im not an expert grower but im not new. This is the first grow in a new room and i have just never encountered a problem like this. Here are more recent pics of whats going on...
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Old 07-31-2020, 09:43 PM #12
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They're not lost.

- The roots look great.
- They all have the same problem, which would tell me it's from the feeding or from the air.
- With that root development, the pH is probably good, because it would take good P uptake and that happens at higher pH's, while otherwise the plants would look like they weren't taking up enough P and K.

So my guess it has something to do with the air. Like I said, sealed grow tents are not my specialty.

Have you tried using air exchange, to see if it makes a difference? Or put one of them outside to see how they react?

Maybe lower the temperature from F78 to F68? I don't know if plants in sealed tents are even more vulnerable to high temperatures.
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Old 08-01-2020, 03:25 AM #13
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They're not lost.

- The roots look great.
- They all have the same problem, which would tell me it's from the feeding or from the air.
- With that root development, the pH is probably good, because it would take good P uptake and that happens at higher pH's, while otherwise the plants would look like they weren't taking up enough P and K.

So my guess it has something to do with the air. Like I said, sealed grow tents are not my specialty.

Have you tried using air exchange, to see if it makes a difference? Or put one of them outside to see how they react?

Maybe lower the temperature from F78 to F68? I don't know if plants in sealed tents are even more vulnerable to high temperatures.

Thanks for the hypothesis. I just added air exchange 2 days ago. I cycle the air for 15 minutes 4 times a day. I turned the CO2 off as well. I transplanted them 2 days ago and they haven't improved or gotten worse in the last 2 days so thats kind of progress...

If they react well to the new soil, that would suggest that the roots outgrew the 4 inch pots in 1 week and the plants ran out of nutrients?

If they keep getting worse in the new soil then its gotta be contributed to the soil or the air. I will then put one outside and see how it does.

Any chance it could be the lights? Its a pretty expensive chinese knockoff LED off Amazon. I have a flower room full of HGL quantum boards waiting to go, i could swap them out and see how they react to a light that i know is high quality?
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Old 08-01-2020, 07:14 AM #14
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I would say your mix isn't holding enough water drying out in 3 days is way too quick, they are also really scrawny looking for the roots they have so there could be a deficiency or ph issue too

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Old 08-01-2020, 04:47 PM #15
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Okay time for second guesses. First I see that the humidity is ranging from 97% to 43%, any chance you're able to get that more consistent? 97% humidity could explain the leaf wilt particularly if you're watering heavy and the water isn't evaporating well. It's I guess possible the little pots ran out of nutrients but that would be low on my radar. Very weird for plants that size to erase all the nutes in a pot without more vertical growth. It could be the light but before I'd say the Chinese light isn't working well I'd lower the light closer to the plants and see if you get leaf response in the next few days.
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Old 08-01-2020, 07:03 PM #16
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Okay time for second guesses. First I see that the humidity is ranging from 97% to 43%, any chance you're able to get that more consistent? 97% humidity could explain the leaf wilt particularly if you're watering heavy and the water isn't evaporating well. It's I guess possible the little pots ran out of nutrients but that would be low on my radar. Very weird for plants that size to erase all the nutes in a pot without more vertical growth. It could be the light but before I'd say the Chinese light isn't working well I'd lower the light closer to the plants and see if you get leaf response in the next few days.


The humidity was only 97% because i spilled water on it while transplanting. It typically stays in the 50% range.

I just checked in and they seem to be doing better in the new soil today. Still yellowish but they perked up a lot. I also only had the LED running at 300 watts. I just cranked it up to 700 watts and turned the CO2 back on. We'll see where they go from here.
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Old 08-13-2020, 03:09 PM #17
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Hi Clayton, how did the plants responds to the changes you made? I am getting a new tent set up as well and very curious on your air exchange. I was having some problems with my tent initially but added a strong exhaust that exchanges the air a few times an hour. So far, that alone has helped immensely. I am not running CO2.
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