Any Ideas what could be causing this?

Hello I have this one plant "The Mask" (Jack Herer x Herijuana) thats leaves are starting to all curl and twist up. I have been giving the plant the same water, the same nutes, and it has same soil mix as the other plant that i have of this strain, and other strains and none of them are doing this. Does anyone know what could be causing this?

Has anyone grown out The Mask from sannies? if so when you grew did you have ne problems with it?

i would say yr ph is off ,i have some leafs that were doing that and the ph was to low,or it could be root bound,now that look at it more i would say transplant her and flush just give her water for a few days and see what happends after u transplant

thanks mushroomman, i will give that a try tonight, transplanting and flushing it.. It all started like a week or two after I transplanted it to its new pot.

Spidermites, Nitrogen toxicity, cold root temperatures. Or a variety of things.