Monstera Is Yellowing. The second reason is that this tropical plant is planted in the wrong soil. It indicates they are unhappy.
It could be watering issues overwatering or under-watering. If a Monsteras leaves are turning yellow due to overwatering the lower leaves will be affected first. Unfiltered water containing adverse chemicals can also cause this issue.
Wet leaves can also attract fungus gnats.
Youll need to move it somewhere warmer and preferably brighter asap. If a Monsteras leaves are turning yellow due to overwatering the lower leaves will be affected first. Wet leaves can also attract fungus gnats. If your soil has gone too dry completely dry the oldest leaves will turn yellow first.