Kalanchoe Passion Poseidon Pink White Cottony Spots - Causes & Fixes

Jump to cause: Mealybugs Powdery Mildew Cottony Blight (Botrytis)

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Mealybugs

The white, cottony appearance is a classic sign of mealybug infestations, where the insects secrete a waxy, white substance for protection. These pests suck sap from the fleshy leaves and stems of your Kalanchoe, often causing leaves to yellow or drop.

Very Common

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How to confirm: Use a cotton swab dipped in rubbing alcohol to dab the white spots; if they dissolve and turn brown, it is likely mealybugs.

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1 Isolate the plant immediately to prevent the mealybugs from spreading to your other houseplants.

2 Use a cotton swab dipped in isopropyl alcohol to manually remove the visible white cottony masses from the stems and leaves.

3 Apply an organic insecticide spray to the entire plant to eliminate remaining insects and larvae.

Bonide Captain Jack's Neem Oil 32 oz

0.9 L • 1 pcs • Organic

$10

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Powdery Mildew

This fungal disease manifests as a white, flour-like coating on the leaf surfaces. It thrives in high humidity and poor air circulation around the dense foliage of Kalanchoe plants.

Common

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How to confirm: Check if the white spots appear more like a dusty film that can be rubbed off easily rather than distinct clumps.

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1 Apply an organic fungicide to the affected leaves to eliminate the powdery mildew spores and prevent further spread.

Bonide Captain Jack's Copper Fungicide 32 oz

0.9 L • 1 pcs • Organic

$12

In Stock

2 Improve air circulation around the foliage and reduce humidity levels to create an environment less hospitable to fungal growth.

3 Prune and dispose of heavily infected leaves to prevent the fungus from spreading to healthy parts of the plant.

Fiskars 5/8" Bypass Pruning Shears

Cutting Tools

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Cottony Blight (Botrytis)

While less common as 'spots,' high moisture levels on the succulent leaves can lead to fungal pathogens that create fuzzy, greyish-white mold. This is often a secondary symptom of overwatering or decaying organic matter near the base.

Common

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How to confirm: Inspect the base of the plant and the soil surface for any signs of soft, mushy tissue or dark decay.

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1 Remove all affected leaves and decaying organic matter from the base of the plant to prevent the fungus from spreading.

2 Reduce watering frequency and ensure the soil is completely dry before next application; use a moisture meter to monitor levels accurately.