Curling leaves, please help me diagnose!

redzer

Member
I have 3 plants in my grow room at the moment 2 are roadrunners 2s, these are autoflowering plants. The third is a plant that i acquired from a friend which was let grow naturally and was beginning to flower, she was kept in a pot far to small is stunted because of this, I put her into 24hr lighting and she is in a 9 litre pot and up until last week was really bushing out but now Im not sure whats wrong. Leaves are curling in all different directions. I havnt expirienced this with any of my others.

The day-time temp in the room is low 20s (celsius)
Using a 250w hps with euro reflector
The ph of the soil is 6.1

Any ideas?
 
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