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 Monstera Pothos Leaf Accent Table Giftige Pflanzen fr Hunde & Katzen AniForte Magazin Philodendron Monstera Split Leaf 4" Pot NURSERY POT ONLY Kirschlorbeer pflanzen HORNBACH 2 3 Meter Wintergrner Liguster 'Atrovirens', Dehner