Monstera Leaves Brown Tips. Move your plant away from the window a bit. It happens to the best of us.
Overwatering dark brown spots If you notice that your Monstera is developing dark brown spots on its leaves the most common cause of this is overwatering. Temperature may cause brown spots on the leaves in two ways. For more info read 4 Signs Your Monstera Is Over-Watered here Carefully remove your plant from the pot and using clean sharp pruning shears trim off any roots that look brown or mushy.
The worst part is those leaves will not heal from those spots.
The worst part is those leaves will not heal from those spots. The best home for your Monstera is a place with bright indirect sunlight. She had mentioned that the plant was very wet when she purchased it. Although more tolerant than some other popular houseplants Monsteras do best with humidity of 40 and will typically develop leaf curling and brown leaf tips and edges with humidity much below this.