Kalanchoe Passion Artemis White Cottony Spots - Causes & Fixes

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

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Mealybugs

These small, white, waxy insects congregate in the crevices of Kalanchoe leaves and stems, secreting a cottony substance to protect themselves. They suck the sap from the plant, which can lead to leaf yellowing and stunted growth.

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 Treat the infestation by spraying the plant with an organic insecticide/miticide to kill the insects and their protective waxy coating.

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3 Use a cotton swab dipped in isopropyl alcohol to manually remove visible white cottony clusters from leaf crevices and stems.

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Powdery Mildew

This fungal disease manifests as a white, flour-like coating on the surface of the leaves. In Kalanchoes, high humidity and poor air circulation around the foliage often trigger outbreaks.

Common

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How to confirm: Check if the white spots appear more like a dusting on the leaf surface rather than raised, tufted 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

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2 Improve air circulation around the plant and reduce humidity by spacing it away from other dense foliage.

3 Prune and discard any heavily infected leaves to prevent the fungus from spreading to healthy parts of the Kalanchoe.

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Cottony Blight (Botrytis)

While less common in succulents, high moisture levels can cause Botrytis to create fuzzy, grey-white patches on decaying organic matter or soft stem tissue.

Common

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How to confirm: Inspect the base of the plant for any signs of softening or mushy stems accompanied by the white fuzz.

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1 Prune away all affected stems and fuzzy white patches using sterilized shears to prevent the fungus from spreading to healthy tissue.

Fiskars 5/8" Bypass Pruning Shears

Cutting Tools

$13

In Stock

2 Apply an organic fungicide to the plant to combat the Botrytis spores and protect remaining healthy areas.

Bonide Captain Jack's Copper Fungicide 32 oz