leaves' edges of seedling are curling up

Day 12, since day 10 the leaves' edges are curling. my question is: can this only be related to overwatering or also other environmental causes? (i overwatered the plant in day 9 and the soil is still wet now)
I keep the light (CFL 150w) away 10 cm and the temp in my room is on average 25°C.

That s*** looks dry as f*** man don't be like a desert in your grow room

Sorry that was rude of me. Your plant is thirsty fill the pot up at 3 with a even coat of water until she starts coming out the bottom good do that on repeat every 3 days or sooner depending on how much she's drinking

Guydude1991 said:

Sorry that was rude of me. Your plant is thirsty fill the pot up at 3 with a even coat of water until she starts coming out the bottom good do that on repeat every 3 days or sooner depending on how much she's drinking

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Are you sure she's thirsty? The soil is still wet since 3 days... (i know in the foto seems dry but under the very first layer is wet)

I think she's too hot.....but I'm no expert....

I would move the light back? It looks to hot/dry to me but if your medium is still wet I’m thinking it’s light burn/stress.

If that's an actual 150w cfl, 4"/10cm is likely too close.

Isnt this a sign of to much nitrogen.

You also need about 25% perlite mixed in the soil to help with the drainage and aeration. Let the roots breath and not drown.

Yeah thats most likely one of 2 bro. hot or dry, looks dry in the photo but that heat could be the case drying the top soil, listen to ^^^^^^ everyone here thats the problem im 88% positive 10% lack of knowledge of a master and 2% high as hell and unsure of anything suspect...

WinterSoldier89 said:

Isnt this a sign of to much nitrogen.

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Tips arent yellow and thats usually a ph deficiency that causes that youll see light tips first bud.

Thank you all for the answers! I'll move the light back and tomorrow give some water

Looks like you need some humidity in there.

Renfros right,need humidity in the grow room,try putting a clear dome over the plant and mist the inside with water for a couple of days,are you getting fresh air into the room or space your growing??

TOO HOT … TOO DRY ,increase humidity to 65 , 70 percent. temp .67-72 degrees