Do I have a problem starting?

[Brownthumbs]

Hello,
Any idea what's going on?
Problem: (brief description) leaf curling
-Medium/grow method: OF & SF, perlite
-Feed and supplements used: i added 1 teaspoon 13-7-7 dry fert to bottom 1/3 of soil when I originally filled the pot.
-Water source: half ro & half tap, 6.3-6.5ph She's only had one watering, Saturday, to f20% runoff. Up until Saturday, it was just a spray bottle to keep rapid rooter & surrounding soil moist. The soil/pot did receive a thorough wetting prior to planting. Accurate 8 says ph at root is 6.5
-Strain and age Sag northern lite blu glu, born labor day, so 9 days old
-Climate: 85/79F RH 40% for now. Live in desert, this is in garage, RH has bounced between 10% &50% over the past 9 days
- Light used: MARS TS 1000W @ 50%, 18" from plant, schedule 20/4
-Additional info: noticed it this morning, curling has gotten progressively more pronounced throughout the day

 

[Arthur]

Low rH is the likely culprit for the curling.

 

[Kyote]

Ditto what @Arthur said. Add a humidifier if you can. Seedlings like it 60 to 70% RH

 

[Mañ'O'Green]

Heat and low humidity causes "Tacoing" .

 

[Brownthumbs]

Thanks all, I've cranked the humidifier to high and it's now showing 70%. Hopefully she recovers. Should i have left the dome on?

 

[Kyote]

Thanks all, I've cranked the humidifier to high and it's now showing 70%. Hopefully she recovers. Should i have left the dome on?

You don't need the dome if your humidity is good

 

[Brownthumbs]

My poor girl is getting worse.
Is there recovering from this, or should I start over?

 

[Brownthumbs]

@Mañ'O'Green
So I snipped the taco leaves. They weren't getting any better, and the plant was still growing. I figured if I removed them, the plant wouldn't waist any energy trying to repair them. I now have new curling on the tip of largest fan leaves. Temps have been mainly in the upper 70's inside the cabinet, w/rh 70-80%, and it is still happening. So far, the other two plants are not showing any signs. Any ideas?
Thanks in advance.

 

[Mañ'O'Green]

@Mañ'O'Green
So I snipped the taco leaves. They weren't getting any better, and the plant was still growing. I figured if I removed them, the plant wouldn't waist any energy trying to repair them. I now have new curling on the tip of largest fan leaves. Temps have been mainly in the upper 70's inside the cabinet, w/rh 70-80%, and it is still happening. So far, the other two plants are not showing any signs. Any ideas?
Thanks in advance.
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Taco leaves do not ever need to be removed. they will open. Physically damaged all yellow, brown and dried leaves can be removed.

It can be genetic for the leaves to curl?

 

[Brownthumbs]

Whatever is going on w/this plant is not going away, and appears to be spreading. Could it be the start of Pythium? I don't think I over water, as i only water once a week, but I did test the accurate 8 meter outside in a very soggy flower bed, with a broken emitter when i first got it. Wonder if i transferred something inside. If so, the probe as been in all 3 pots numerous times, so i am sure i've transferred it.

Very noticeable on the leaves at 6, 9 & 12 o'clock positions. That dried waxy look, running along the vein of some of the leaves.