Kalanchoe plants are popular houseplants, known for their vibrant blooms and succulent foliage. A common concern for owners is leaf drop, which signals underlying issues with the plant’s environment or care. Understanding these reasons is the first step toward restoring your plant’s health.
Understanding Why Kalanchoe Leaves Drop
Kalanchoe leaf drop often signals plant stress due to environmental factors or care practices. Identifying the specific cause is crucial for effective intervention and preventing further leaf loss.
Overwatering
Overwatering frequently causes Kalanchoe leaf drop, leading to root rot from consistently wet soil. As succulents, Kalanchoe store water in their leaves and stems, making them vulnerable to excessive moisture. Soft, swollen, or mushy leaves with damp soil indicate overwatering. To fix this, allow the soil to dry completely between waterings and ensure the pot has drainage holes.
Underwatering
While Kalanchoe tolerate some drought, prolonged underwatering also causes leaves to drop. Insufficient water makes leaves shrivel, wrinkle, or become crispy before shedding, as the plant sheds them to conserve moisture. To correct this, thoroughly water the plant until water drains from the pot’s bottom. Check soil moisture by inserting your finger about two inches deep; water if it feels dry.
Light Issues
Both insufficient and excessive light contribute to Kalanchoe leaf drop. Too little light causes leggy, weak growth and eventual leaf shedding. Conversely, too much direct sunlight can burn leaves, causing them to discolor and fall. Kalanchoe thrive in bright, indirect light, such as from a south or west-facing window. If natural light is limited, a grow light can provide 6 to 8 hours of bright light daily.
Temperature Stress
Extreme temperatures, both cold and hot, can shock a Kalanchoe, resulting in leaf drop. These plants prefer temperatures between 55°F and 85°F. Below 50°F, chilling injury can occur, leading to wilting and leaf shedding. Excessively high temperatures cause rapid dehydration and stress. Keep Kalanchoe away from cold drafts, uninsulated windows, or direct heat sources to maintain a stable environment.
Nutrient Deficiencies
Nutrient deficiencies can weaken a Kalanchoe, making it prone to leaf drop. A lack of essential nutrients impairs the plant’s overall health. If other causes are ruled out, consider fertilization. Apply a balanced succulent-specific fertilizer during the growing season, typically spring through summer, to support healthy foliage.
Pests and Diseases
Pests and diseases can stress Kalanchoe plants, leading to leaf loss. Common pests like aphids or mealybugs feed on plant sap, weakening leaves until they drop. Fungal diseases, often from overwatering, can cause leaves to yellow, rot, and fall. Regularly inspect your plant for pests or unusual spots. Promptly address infestations by wiping them off or using appropriate treatments.
Environmental Shock
Sudden environmental changes can trigger temporary leaf drop as the Kalanchoe adjusts. This occurs after repotting, moving the plant to a new location with different light or temperature, or during seasonal transitions. The plant needs time to acclimate. When making changes, do so gradually to minimize stress. Consistent care during this adjustment helps the plant recover quickly.
Long-Term Health and Prevention
Consistent care routines are crucial for preventing future Kalanchoe leaf drop and promoting sustained plant health. Provide stable conditions that mimic their natural habitat.
Always check soil moisture before watering, allowing it to dry out between sessions to prevent root issues.
Ensure consistent bright, indirect light, adjusting placement as seasons change.
Maintain stable room temperatures, ideally between 60°F and 85°F.
Use a well-draining potting mix, such as a cactus or succulent blend, and a pot with drainage holes.
Fertilize regularly, but not excessively, during growing months to support robust growth.
Periodically inspect your plant for early signs of pests or disease, addressing them promptly.