Kalanchoe thyrsiflora Sudden Leaf Drop - Causes & Fixes

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Overwatering and Root Rot

Kalanchoe thyrsiflora are succulents that store water in their fleshy leaves; excessive moisture causes the roots to suffocate and decay, leading the plant to shed leaves as it fails to transport nutrients.

Very Common

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How to confirm: Gently lift the plant from its pot to check if the roots are dark, slimy, or have a foul odor.

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1 Immediately remove the plant from its current container and inspect the roots for any mushy, black, or foul-smelling decay; trim away all rotted sections using sterilized tools.

2 Repot the plant in a well-draining, gritty substrate specifically designed for succulents to ensure moisture does not linger around the root zone.

3 Transition the plant to a pot with excellent drainage and use a moisture meter to ensure you only water when the soil is completely dry to the touch.

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Temperature Shock/Cold Stress

This species is sensitive to temperatures below 50°F (10°C); sudden drops in temperature can cause the plant's metabolic processes to stall, resulting in rapid leaf abscission.

Very Common

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How to confirm: Check if the plant was recently moved near a drafty window or exposed to nighttime frost.

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1 Immediately move the plant to a warmer, stable environment, ensuring temperatures remain consistently above 50°F (10°C).

2 Avoid placing the plant near cold drafts, windows, or air conditioning vents to prevent further metabolic stress.

3 Monitor soil moisture closely, as cold stress can slow evaporation; use a moisture meter to ensure the soil is not staying too wet during this recovery period.

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Pest Infestation (Mealybugs or Scale)

Sucking insects like mealybugs feed on the sap of the paddle-shaped leaves, weakening the plant's structural integrity and causing it to drop leaves in an attempt to conserve resources.

Common

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How to confirm: Inspect the crevices where the leaves meet the stem for white, cottony clusters or small brown bumps.

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1 Inspect the undersides of the paddle-shaped leaves and the leaf axils for white, cottony mealybug clusters or small, hard scale insects.

2 Apply an organic insecticide spray to the entire plant, ensuring you coat the crevices where pests hide, to eliminate existing insects and larvae.

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3 Remove and discard any heavily infested or severely damaged leaves to prevent the spread of pests and help the plant conserve energy.

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Extreme Light Fluctuations

Sudden changes from high-intensity sunlight to deep shade can disrupt the succulent's photosynthesis cycle, causing it to shed older leaves to adapt to new light levels.

Common

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How to confirm: Observe if the plant's location has recently changed or if it has been covered by growing foliage.

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1 Stabilize the plant's environment by placing it in a location with consistent, bright, indirect light to prevent further light-induced stress.

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2 Monitor the soil moisture levels closely during this transition period to ensure the plant is not being overwatered while it is in a stressed state.

GROWIT Soil Moisture Meter - Blue

Water Meters

$12

In Stock

3 Avoid applying heavy fertilizers until the plant has stabilized and stopped shedding leaves.