Is my plant dying? with pictures

Hi! This is my first time growing (4 plants).
One of the plants had some "birthmarks" from the start(seedling phase).
3 days ago I noticed 2 more plants were getting some blemishes and looked a bit unhealthy, and leaves curling slightly upwards around the edges, I tried to search forever, and came to the conclusion it was "tacoing", most commonly this was because of a deficiency in magnesium and calcium. So I gave all the plants a low dose of fertilizer (sensi grow), for the first time. Now, 2 days later, the plants have exponentialy gotten worse, and I fear the worst.

Seeds: Northern Lights Auto (from Seedsman) (Northern Lights x Ruderalis) - Mostly Indica
Tent Temperature: 23-28c (73-82f)
Tent humidity: 61-73%
Soil pH: 6.5 - 7
Soil contents: Plagron Growmix (with perlite)
Light: Mars Hydro TS1000
Light intensity at the plant-level: 17-23k LUX
CO2 levels: 400-650ppm

I am a newbie, but I am really trying my best.
I have reduced the intensity of the humidifier, and will try to reach a level of 40-50% instead, maybe that will help.
I also saw some roots were visible in the soil, so I topped over with a little more soil the keep the roots covered.

About a week ago, I repotted them, as the old soil was not draining well. (I repotted with the Plagron Growmix)
As such, I suspect that the repotting gave the roots more nutrients again, and perhaps giving them liquid nutrients was the wrong decision.

Any help is highly appreciated!

Every pot pic looks very wet...be careful not to let them stay this way for too long.
I would double check my pH, both at the soil level and at the feeding / water level...the variegated leaves are telling you something.
It's more important to keep your humidity stable vs shooting for a special number, which is not the issue; don't over think it.
Good luck

CannaCountry said:

Every pot pic looks very wet...be careful not to let them stay this way for too long.
I would double check my pH, both at the soil level and at the feeding / water level...the variegated leaves are telling you something.
It's more important to keep your humidity stable vs shooting for a special number, which is not the issue; don't over think it.
Good luck

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Thanks for the reply!
Alright, I will make sure to not give them too much water, I think I have been doing that a bit too much, learner mistakes I guess haha
I will double check the pH tomorrow, what do you mean by "feeding/water level"? Last time I only checked at about 5cm depth (2 inces).
I will make sure the humidity stays stable then, maybe just gradually decreasing it as the plant grows. Is a range of 61-73% unstable?

Thanks again! I hope they power through!

mushroomcookiedough said:

Alright, I will make sure to not give them too much water, I think I have been doing that a bit too much, learner mistakes I guess haha

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They are definitely over watered. More than likely causing all the issues you are seeing on the plants. There is water all over the leaves so I'm not sure if you are misting the leaves on top of watering. If that's the case it's not needed. Beads of water on the leaves can act as a magnifier and burn the leaves. Just cut back on how often you are giving them water and they should be fine.

twentyeight.threefive said:

They are definitely over watered. More than likely causing all the issues you are seeing on the plants. There is water all over the leaves so I'm not sure if you are misting the leaves on top of watering. If that's the case it's not needed. Beads of water on the leaves can act as a magnifier and burn the leaves. Just cut back on how often you are giving them water and they should be fine.

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Yeah I water the leaves with a mister, also to clean off any dust, dirt and particles from the leaves.
Will definitely stop spraying the leaves with a mister too now, along with watering less frequently.

Thanks a ton for the input!

They look fine to me.

mushroomcookiedough said:

Thanks for the reply!
Alright, I will make sure to not give them too much water, I think I have been doing that a bit too much, learner mistakes I guess haha
I will double check the pH tomorrow, what do you mean by "feeding/water level"? Last time I only checked at about 5cm depth (2 inces).
I will make sure the humidity stays stable then, maybe just gradually decreasing it as the plant grows. Is a range of 61-73% unstable?

Thanks again! I hope they power through!

Click to expand...

I meant, check your pH both of your feed and your plain water, along with your medium if possible.