Could be a combination of things, or one thing.

The most common is over fertilizing, or overwatering, or both.

Could also be, too much light, too little light, high temperature.

Please give us specific details to its growing conditions, light, how often you water, how much you water, grow medium, etc.
THContent Reviewed by THContent on . leaves are curling from the sides!? i need some help, the top leaves of my plant are curling in from the sides. i don't know what could be causing this. Rating: 5