Why do Kalanchoe leaves develop white patches, and how to grow it: methods and precautions?
Kalanchoe (Kalanchoe blossfeldiana) is a common indoor ornamental plant, loved for its unique flower shape and long blooming period. However, during cultivation,
Kalanchoe sometimes develops white patches, which leaves many flower growers puzzled. Next, let us explore together the causes of white
patches on Kalanchoe and how to deal with them, and share some precautions for growing Kalanchoe.
Causes of white patches on Kalanchoe
The main causes of white patches on Kalanchoe are as follows:
1. Insufficient light: Kalanchoe needs sufficient light for photosynthesis; if kept in a dark environment for a long time, the leaves are prone to developing white patches.
2. Nutrient deficiency: A lack of certain nutrient elements during the growth of Kalanchoe, such as calcium and magnesium, can also cause white patches on the leaves.
3. Pests and diseases: Kalanchoe may be attacked by diseases such as powdery mildew and downy mildew, or by pests such as aphids and red spider mites, causing white patches on the leaves.
How to deal with white patches on Kalanchoe
Increase light: Move the Kalanchoe to a place with sufficient light, ensuring it receives at least 4 hours of sunlight per day. But be careful to avoid strong direct sunlight, so as not to scorch the leaves.
2. Supplement nutrients: Provide Kalanchoe with comprehensive nutrient elements; you can water it with a compound fertilizer or a nutrient solution specially formulated for flowers. At the same time,
you can also add bone meal, eggshells and other fertilizers rich in calcium and magnesium to the soil.
3. Prevent and control pests and diseases: Regularly check the leaves and branches of Kalanchoe, and take timely measures to prevent and control pests and diseases when found. For diseases such as powdery mildew
and downy mildew, an appropriate fungicide can be sprayed; for pests such as aphids and red spider mites, an insecticide can be used for control.
Precautions for growing Kalanchoe
Watering: Kalanchoe likes a moist environment, but too much watering can easily lead to root rot. Therefore, during cultivation, pay attention to
controlling the amount of watering and keeping the soil slightly moist. At the same time, when watering, avoid pouring water directly on the leaves, so as to prevent diseases.
2. Ventilation: Keeping the growing environment well ventilated helps reduce the occurrence of pests and diseases. Especially when temperatures are high in summer, strengthen
ventilation and air exchange to lower the plant's temperature.
3. Pruning: Kalanchoe grows quickly and tends to produce too many branches and leaves. Regular pruning can maintain the plant's appearance and
is also beneficial to the plant's healthy growth. When pruning, be careful to use sharp scissors to avoid damaging the plant.
4. Repotting: Kalanchoe has a relatively well-developed root system and needs enough space to grow. When the plant becomes too lush or the soil nutrients are exhausted,
repot it in time. When repotting, choose soil with good air permeability and drainage, and water appropriately after repotting to promote
the plant's growth.