Monstera Deliciosa Getting Brown Spots. Bacterial and fungal infections on Monstera tend to take the form of brown to black spots with a yellow halo around them. If you notice any brown spots.
Now lets go over the signs to look out for that indicate your monstera is over-watered. Monstera turning brown could be a symptom of a disease. Try moving your plant to a place with less direct sunlight or make sure there is a sheer curtain in front of the window.
If you notice the foliage of your Monstera deliciosa developing dry brown spots the plant is getting too much sun and the foliage is sunburned so move it to a location receiving bright filtered or indirect light.
I highly recommend the Dyna-Gro Grow fertilizer. Brown specks or spots are a sign of too much light. Brown Spots on Monstera Plants. Brown spots on the underside of leaves indicate red spider mites.