Monstera Leaves Turning Yellow. If several leaves are yellowing and theyre looking a bit limp and sad then overwatering is the most likely culprit. In general Monstera are pretty resilient and bounce back if the mistake is fixed soon enough.
Monstera turning brown could be a symptom of a disease. If it is underwatered the smallest of the monstera leaves start to turn yellow and fall off the plant in the case of monstera. She discusses the care of her plant in this.
Just as overwatering can cause Monstera leaves to turn yellow underwatering can also cause yellow leaves.
Not a cause for concern or reason to believe you are overwatering. If indoors in the winter only 16 degrees of heat it is necessary to water only once in 10-15 days. If you notice the lower leaves especially the oldest leaves are turning yellow go ahead and feel the soil. Damage from indoor plant pests can cause your Monsteras leaves to develop yellow spots or generalized yellowing.