New Grower Not sure what’s up

[ChefB202]

I use living soil, so I filled my pot with my living soil and then used a solo cup(red) to leave a hole, then filled it with plain old Roots Organics potting soil to create a buffer between the hot soil and planted them into the un- amended soil

 

[ChefB202]

Betting your seeing light stress. Cobs can be pretty intense. I'm a good 36 inches over 30 day old girls. In seedling stage I pull lights and dim others. The plant is focused on getting a root system running, and the leaves aren't really doing much yet, easy to burn.

Your temps are pretty low too if that's lights on temp. And unrelated to the issue.

That’s kinda what I thought. In fact as I’m reading this I’m taking them all the way up 50’

 

[Grim Reefer]

I use living soil, so I filled my pot with my living soil and then used a solo cup(red) to leave a hole, then filled it with plain old Roots Organics potting soil to create a buffer between the hot soil and planted them into the un- amended soil

Ok that seems like you did that correctly. So I'm going to rule out any kind of nutrient burn.

I have no experience with Cob LEDs and have to do a bit of catching up to know more about them.

But maybe take @Arthur advice as he seems to have experience with cobs.

 

[Arthur]

There is a huge difference in growth if you get the leaf temps to 80-82.

I'm an old hps guy and have struggled with 82 to 85 and lights on... it makes me cringe a little... but.. difference in growth from a room temp of 75 and 85 are night and day. Seems like you can almost watch the leaves rise @ about 80*

 

[ChefB202]

Betting your seeing light stress. Cobs can be pretty intense. I'm a good 36 inches over 30 day old girls. In seedling stage I pull lights and dim others. The plant is focused on getting a root system running, and the leaves aren't really doing much yet, easy to burn.

Your temps are pretty low too if that's lights on temp. And unrelated to the issue.

It’s an exceptionally windy/cold night here so it’s lower than normal usually it runs around 81F-83F

 

[ChefB202]

I will say that my biggest battle has been humidity, I even went out and bought a humidifier to get it up but can’t get it above 45%.... my space is really dry in winter, but in spring/summer it’ll be much easier

 

[Boognelson87]

@ChefB202 they are getting you on par. Raise lights to 42 inches if can be my guess. I run my blurples 30-32 inches above my seedlings and your light is more powerful. Then go from there accordingly. also, like the guys say feed cal mag about week 2. I just fed mine I believe first dose day 17 this run. Last run was around day 14.

 

[Boognelson87]

Also, damp some towels. Put in your tent. My humidity for my first grow I started in January this year my humidity was 27 percent. Couldn't get it up. Used 3 damp towels and got it to 35. Kept wetting them daily. They are in flower now and my humidity is in mid 40s.

 

[Arthur]

I will say that my biggest battle has been humidity, I even went out and bought a humidifier to get it up but can’t get it above 45%.... my space is really dry in winter, but in spring/summer it’ll be much easier

I'm backwards from that... wish that was something we could trade a little of....

 

[Boognelson87]

^^ Arthur is the one who suggested damp towels to me 2 months ago @ChefB202. It does work.