Brown Spot On New Monstera Leaf. Residual salts in the soil from excess fertilizer can affect roots and lead to spotting symptoms. Leaves might turn yellow develop brown spots droop or refuse to develop those holes and slots that make these leaves so striking.
These factors include light temperature and humidity fertilizer and water including its quality. If the edges of your monstera turn a light brown color and get crispy your plant might be thirsty. Pest infestations may cause mottled spotting.
Monstera Deliciosa with blackbrown spots.
On the other hand black spots on Monstera can also be caused by under watering. These dead tissue spots can spread really quickly. Prune off all leaves that have any spots as soon as you notice them. If the soil feels dry give it a drink and consider watering a little more than usual.
