If your monstera looks healthy but all of the sudden the leaves are curling in, its trying to tell you something! , The first thing I would check is the soil! , Most common cause of curling leaves is Are Small Pots Bad for Succulents? (And When to Repot) OurHouseplants Rattlesnake Calathea Lichtenfelt's Can you use containers without drainage holes when planting succulents? YouTube