Causes of Yellow Spots on Alocasia (Dumb Cane) Leaves and How to Fix Them

Alocasia is very common in our daily lives. It grows lushly and has very high ornamental value in a suitable environment. For specific cultivation methods, you can refer to how to grow Alocasia. However, mistakes are inevitable during cultivation, causing yellow spots on its leaves. Now let Facaishu Home explain it for everyone.

Changes in the environment

Changes in the environment can cause yellow spots on Alocasia leaves, mainly because the soil environment is unsuitable. For Alocasia cultivation, if the soil has too high an alkali content or the soil is not changed for a long time, the soil will lack nutrients, causing its leaves to develop yellow spots and droop.

Solution: Generally, Alocasia is repotted in spring and autumn. One third of the soil needs to be replaced, old roots and diseased roots should be removed, and then topdressing can be applied.

Unreasonable watering

Watering Alocasia is very particular. Too much watering or long-term water shortage can both cause yellow spots on its leaves. Too much watering can cause its roots to rot, while long-term water shortage can cause its root soil to harden, making watering uneven and seriously affecting its growth.

Solution: When there is too much watering, stop watering immediately. If the roots have rotted, repot it. In winter, control its watering. When there is a water shortage, water with a spray bottle, just watering thoroughly.

Unreasonable lighting

Alocasia prefers cool shade, and lighting needs attention. Long-term exposure to strong sun will make its leaves turn yellow, while extreme lack of sunlight will also prevent it from carrying out photosynthesis, severely limiting its growth and even causing yellowing and death.

Solution: For Alocasia lighting, the light does not need to be too strong, but it cannot be absent. Generally, about three hours of light per day is enough.

Unsuitable temperature

Unsuitable temperature can also cause Alocasia leaves to turn yellow. Its most suitable temperature is 20~30°C. Too high or too low a temperature will affect its growth, so temperature must be strictly controlled.

Solution: Alocasia mainly grows in summer and winter. In summer, with high temperatures, keep its soil moist, spray water frequently, and provide shade. In winter, move it indoors to provide a warm environment.

Unreasonable fertilizing

Alocasia fertilizing also needs to be reasonable. Too much fertilizer and long-term lack of fertilizer can both cause problems in its growth.

Solution: For Alocasia fertilizing, generally apply phosphorus and potassium fertilizer once about every 20 days. In winter, when the temperature is below 15°C, stop fertilizing. When there is a fertilizer shortage, spray liquid fertilizer on its leaves to supplement nutrients, and avoid contact with its roots.

After understanding this, there are detailed solutions for some problems that arise during Alocasia cultivation, making it easier for us to grow Alocasia better.