Kalanchoe, as a popular choice for home gardening, is loved for its long blooming period and rich colors. Many gardening enthusiasts encounter the issue of spotted leaves on Kalanchoe during maintenance, which not only affects its ornamental value but may also impact the plant's health. This article will thoroughly analyze the reasons for spots on Kalanchoe leaves and provide corresponding prevention methods.
Reasons for spots on Kalanchoe leaves1. Disease infection
Spots on Kalanchoe leaves are most commonly caused by disease and pest infections, with common diseases including leaf spot disease and powdery mildew, while pest infections may be caused by aphids or red spiders.
2. Improper water management
Both excessive and insufficient watering can lead to spots on Kalanchoe leaves. Excessive watering can cause root hypoxia and root rot, which in turn affects leaf health; whereas insufficient watering can lead to leaf dehydration and spots.
3. Insufficient lighting
Kalanchoe thrives in ample sunlight, and if it remains in a dark environment for extended periods, leaves may develop spots.
4. Improper application of fertilizers
Excessive application of fertilizers, especially nitrogenous fertilizers, can lead to excessive plant growth and spots on leaves. Improper fertilization may also result in soil salinization, affecting plant health.
5. Environmental factors
Environmental factors such as temperature and humidity also affect the health of Kalanchoe leaves. High temperatures and low humidity can lead to spotted leaves.
Prevention methods for spotted leaves on Kalanchoe1. Disease prevention
(1) When diseases are detected, promptly remove the diseased leaves and incinerate or bury them deeply.
(2) Spray the plant with a 75% methyl thiophanate wettable powder preparation diluted 800 times or a 50% carbendazim wettable powder preparation diluted 1000 times.
2. Water management
(1) Water the plant according to soil moisture, avoiding excessive or insufficient watering.
(2) Water thoroughly to prevent waterlogging.
3. Light adjustment
Place Kalanchoe in a sunny location, ensuring 4-6 hours of direct sunlight daily.
4. Fertilizer application
(1) Apply fertilizers reasonably, avoiding excessive application of nitrogenous fertilizers.
(2) Apply phosphorus and potassium fertilizers according to the growth stage.
5. Environmental adjustment
(1) Maintain appropriate temperature and humidity to prevent the plant from overheating or getting cold.
(2) Ventilate regularly to reduce air humidity.
There are various reasons for spots on Kalanchoe leaves. Gardeners should pay attention to observations during maintenance, promptly identify issues, and take corresponding measures. Through scientific management, your Kalanchoe will undoubtedly thrive and bloom beautiful flowers.