Leaves are Curling! HElP

Anyone know why they are curling I have another 2 exactly the same and they are fine as wine, Any ideas?

With just a pic I'll say heat stress.

Some plants react differently in the same envoirment.
One thing I noticed from you photos is that your not watering correctly.
Just dribbling some water around the base of your plant is not good enough, you must saturate your medium until runoff, and then water again in like 3 day's (depending on size of plant)
No more, no less.
Oh, and make sure you are feeding them.
Good luck

overfeeding sometimes causes leaf curl....did u feed it recently?