Causes and treatments for yellow poinsettia leaves

1. Too much light

Reason: Poinsettia is a short-day plant. If the sunlight is too strong and the ventilation is poor, the poinsettia will easily turn yellow and lose its leaves due to high temperature and dryness.

Treatment: It needs to be placed in a semi-shaded place with sufficient diffused light and good ventilation. When exposed to sunlight, appropriate shielding measures should be taken. Spray water on the ground frequently to increase the air humidity.

2. Overwatering

Cause: Excessive watering can easily lead to water accumulation in the pot. At this point, the poinsettia's roots will lack oxygen and may develop root rot, which can cause the leaves to turn yellow.

Solution: Place the poinsettia in a well-ventilated, shady place, provide sufficient light, dry out excess moisture in the soil, and then resume normal watering. When growing poinsettias, you need to control the amount of watering reasonably to avoid water accumulation. In addition, if heavy rain occurs, drain the water in time, or move the poinsettia indoors before the rain.

3. Temperature is too low

Reason: Poinsettia prefers warm climate and is not cold-resistant. The suitable temperature for growth is between 15-20℃. In winter, the night temperature must be kept above 15℃ and not lower than 5℃, otherwise the poinsettia leaves will turn yellow and fall off. If you open the windows and let in cold wind in winter, the poinsettia leaves will turn yellow or even fall off.

Solution: The temperature needs to be raised and the plants should be placed in a relatively stable indoor environment for maintenance. After mid-October, it is best to place it in a warm, sunny place facing south to ensure that it will not be affected by cold winds.

4. Root rot

Reason: If the pot is too wet for a long time, the roots of the poinsettia will rot, causing root rot and the leaves will turn yellow.

Solution: If root rot occurs, you need to dig the roots out of the pot, cut off the rotten roots, and then disinfect them to prevent further virus infection, and then replant and maintain them.