I'm five days late with this update, but I have been mad busy with work.
Also, she hasn't been doing good at all. She has hardly grown, and she doesn't look healthy.
The soil I bought has a heavy infestation of fungus gnats, so maybe the larvae have been eating her roots. Idk.
I've treated the soil a couple of times with neem, but honestly, that didn't seem to help, and the fungus gnats are as happy as they can be. I have ordered SF nematodes, and they should clear up the gnats.
I still haven't decided if I should pull her and start over, but she has improved in the five days since the pics.
In any case, the fungus gnats have to go before then, so I'll let her ride until then and then decide.
@Biotabs, It sure looks like she got burnt from too hot soil, but there's only light mix (the Dehner soil you recommended) in that corner of the planter, so I have no clue what is happening. I'll leave her until I have gotten rid of the gnats and only then decide if I should pull her and start over. I'd rather lose some time by starting over than keeping a stunted plant.
@nonick123, I agree 100% that it looks like a nutrient burn, but the thing is that she is growing in the corner of the planter with only lightmix, with no additional nutrients 🤷
@resi_max, What's alarming with an average VPD of 1.1? It should be 0.8-1.0 for seedlings, but it isn't that far off. Besides, I have absolutely no controls besides an exhaust fan, so there isn't much to tamper with.