Too much or too little light is also the reason behind the yellowing of the monstera leaves.
While the monstera plant doesn’t mind being in the sun, if the plant is exposed to the harsh sunlight for long hours, it will scorch the foliage and becomes crisp yellow.
Similarly, if the plant is constantly in low light, then the leaves will turn soft and pale, and plant might suffer from overwatering if it is regularly watered.
What You’ll See: Crisp brown, yellow, burnt foliage in extreme sun. Soft and pale-yellow leaves in too much shade.
Solution: Select a location where it gets bright indirect light and several hours of mild direct light.
2. Pests and Diseases
Mealybugs, spider mites, and feed on the leaves that can cause them to turn yellow.
What You’ll See: Yellow spots on leaves in a smaller area. If the infestation is large, it can make the entire leaf take a pale hue.
Solution: Mix 1/2 or 1 teaspoon of mild dish soap in a gallon of water and spray it on the affected area. If this won’t work, you always can use chemical pesticides.
3. Aging Foliage
Not all monstera leaf yellowing should concern you. Some leaves turn yellow naturally due to old age. When the plant is pushing out new growth, the lower ones start to turn yellow and fall.
This is a natural process where the plant sheds off the old leaves while focusing its energy on growing new ones.
What You’ll See: Soft pale-yellow leaves at the bottom of the plant with upper green growth.
Solution: Snip away the lower foliage using a sanitized shear.
4. Humidity and Temperature
Too much dry air indoors can also make the leaves develop yellow spots on edges or go pale. Monstera and other aroids are tropical plants that love humidity and warmer surroundings, so it is important to give them a balance of both.
Even hotter temperatures around them can cause the leaves to turn yellow. Common indoor temperature range of 60-80°F or 15-27°C is suitable for these plants with about 50-60 percent humidity levels.
What You’ll See: Yellow patches on monstera leaves and some curling as well. Pale spots on the edges of the foliage.
Solution: Mist the leaves sometimes, keep the pot on a pebble tray filled with water or use a humidifier.
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