Why Are My Alocasia Polly Leaves Turning Yellow?

Written by Ivy

Dec 22 2021

Why Are My Alocasia Polly Leaves Turning Yellow?
Alocasia Polly has thick and wide leaves, beautiful leaf veins, thick green and shiny leaf color. It is a very good foliage plant. However, during the caring process, many friends will find that Alocasia Polly leaves turn yellow, so what is the reason? Is it lack of watering? We must find out the reason and deal with it again, otherwise it will be easy to die.
If abnormal yellow leaves are found in the old leaves of Alocasia Polly, be vigilant. It is likely to be rotten roots. We can repot and check it. If only the outer leaves of Alocasia Polly are yellow leaves, we will consider the reason of temperature. It may be that Alocasia Polly is going to start dormancy. Let's take a specific look at the causes and solutions of Alocasia Polly yellow leaves.

Low or High Humidity Level

If the basin soil is continuously wet and the soil is still wet, Alocasia Polly still has yellow leaves. This is caused by the excessive humidity of the basin soil, and the roots of Alocasia Polly have been damaged.
If the yellow leaves of Alocasia Polly are serious and the leaves begin to droop, it is the case of rotten roots. We need to timely remove the soil and check the rotten roots.
Alocasia Polly with rotten roots shall timely remove the basin soil, clean the root system, remove the rotten roots, soak carbendazim solution at the bottom of the rhizome, and cut off too many branches and leaves to reduce water loss. After that, it will be transplanted into new basin soil, watered and kept in a ventilated and transparent place to slowly ease Alocasia Polly.
Another situation is that the basin soil is dry for a long time, resulting in the yellow leaves of Alocasia Polly, the leaves will gradually wither, and the leaves at the bottom will continue to fall. We only need to insert bamboo sticks or fingers into the basin soil. If the soil is particularly dry 3 ~ 5cm below the soil, or we don't pay attention to watering, it is basically caused by excessive water shortage in Alocasia Polly basin soil.
If Alocasia Polly is short of yellow leaves, we can directly clean up the yellow leaves and dead leaves of Alocasia Polly, soak the plants in a basin, prepare a large basin of clean water, soak the potted plants in clean water for 10 ~ 20 minutes (the water level can cross the basin soil), pick them up in time to drain the water and put them in a ventilated and transparent place, and the plants will slowly ease up in a few hours.
Read More:
What Is The Best Soil For Alocasia Polly?

Improper Light

Alocasia Polly is sensitive to light, afraid of strong light environment and resistant to shade. If Alocasia Polly is exposed to strong light for a long time during management, it will be sunburned and Alocasia Polly yellow leaves will appear. We should move Alocasia Polly to a cool place in time when there is strong light. We should also have more ventilation and sprinkle water frequently to help recover.
Read More:
How Much Light Does Alocasia Polly Need?
Why Are My Alocasia Polly Leaves Turning Yellow
If you find that the leaves of Alocasia Polly start to turn yellow from the bottom of the plant, the color of the leaves is dim, Alocasia Polly grows thin and the gap between branches and leaves is widening, it is basically a lack of light. If the plants raised in the shade for a long time have yellow leaves, they should not suddenly move to places with too strong sunlight. Gradually increase the light and suddenly expose to the sun. The plants are easy to be damaged by the sun.
We can move the yellow leaf Alocasia Polly to a place with more sunshine every few days to gradually increase the light and make the plants grow stronger. If only one side of the plants raised by the windowsill can receive sunlight, the branches and leaves of Alocasia Polly will grow crooked. At this time, the branches and leaves of the plants can be corrected slowly with horticultural iron wire. Pay attention to 180 degrees every other turnover basin, so that the branches and leaves of Alocasia Polly can grow evenly.


Yellow leaves will appear when Alocasia Polly is infected with diseases and pests, such as long-term residual water on the leaves, poor ventilation and light transmission between the branches and leaves of Alocasia Polly, and ponding at the leaf center. These are common causes of leaf infection. Then yellow or brown spots will appear on the leaves of Alocasia Polly.
If you find that Alocasia Polly's leaves begin to grow disease spots, and the leaves are yellow and black, this is the breeding of diseases. We need to cut off the yellow, black and diseased branches in time, improve the ventilation, let the water on the leaves dry as soon as possible, and don't spray Alocasia Polly at night.
Of course, you also need to spray fungicides. If the disease is not serious, you can use common fungicides such as carbendazim, methyltobuzin or chlorothalonil. When spraying, you must mix water in proportion and spray it evenly on the leaf surface, leaf back and basin soil.
If the disease of Alocasia Polly is particularly serious, it is necessary to spray powerful fungicides, such as common azoxystrobin, tebuconazole and acetaminophen. Alocasia Polly is particularly prone to breeding starscreams in dry and poorly ventilated places.


Alocasia Polly likes to grow in a humid environment. Excessive watering during maintenance is easy to cause Alocasia Polly yellow leaves. It is difficult to breathe if the root system is watered too much. We should pay attention to watering alocasia Polly in an appropriate amount. We should water it thoroughly when the growing season is dry. We should spray water frequently when the climate is dry. We should pay attention that there should be no ponding in the soil of Alocasia Polly basin.
Read More:
How Much And How Often To Water Alocasia Polly?

Clay Soil Type

Alocasia Polly is suitable for loose and breathable soil. If the clay soil is hardened, the root system will not grow normally and the leaves of Alocasia Polly will turn yellow. We need to loosen the soil or replace it with new soil.

Temperature Stress

Alocasia Polly has a temperature suitable for its own growth. Generally speaking, it is the most suitable temperature between 12-18 ℃. Especially in winter, we should put Alocasia Polly in a sunny position. If Alocasia Polly is placed in a place with poor ventilation and low temperature for a long time in winter, it will cause Alocasia Polly frostbite and produce yellow leaves. In winter, the temperature of Alocasia Polly breeding shall not be lower than 12 ℃ and shall be placed in a place with good light. Watering can be reduced appropriately. If the ambient temperature of Alocasia Polly cannot meet the requirements, we can make a simple insulation shed with plastic film to help Alocasia Polly spend the winter.

Lack of Fertilization

The growing season of Alocasia Polly is from March to October every year. During this period, more nutrients are consumed, so it is necessary to apply fertilizer frequently. If we do not fertilize Alocasia Polly for a long time and supplement nutrients, and the plant lacks nutrients, Alocasia Polly is prone to yellow leaves. At this time, we should apply nitrogen-containing fertilizer to Alocasia Polly once a half month, and supplement phosphorus and potassium fertilizer in advance during flowering.