Echeveria Lemon Berry White Cottony Spots - Causes & Fixes

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

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Mealybugs

These small insects secrete a white, waxy, cotton-like substance to protect themselves. They hide in the tight crevices between the fleshy leaves of Echeveria and suck the sap, leading to leaf yellowing and rot.

Very Common

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How to confirm: Use a toothpick to gently probe the white spots; if they move or reveal tiny insects underneath, it is 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 waxy coating.

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3 Use a cotton swab dipped in isopropyl alcohol to manually remove visible white cottony clusters from the crevices of the leaves.

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Powdery Mildew

This fungal pathogen appears as a fine, white powdery coating on the leaf surfaces. It thrives in high humidity and poor air circulation around the dense rosette of the Echeveria.

Common

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How to confirm: Wipe a finger across the white spot; if it wipes off like dust rather than looking like a clump, it is likely fungal.

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1 Treat the affected leaves immediately with an organic fungicide to stop the spread of the fungal spores.

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2 Improve air circulation around the rosette and reduce humidity by avoiding overhead watering.

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

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Cottony Blight (Botrytis)

In high moisture conditions, certain fungi can create fuzzy, grayish-white patches on decaying organic matter or succulent tissue. This often occurs if water sits in the rosette of the Echeveria for too long.

Common

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How to confirm: Check if the white spots are accompanied by soft, mushy, or translucent areas on the leaf base.

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1 Remove any affected leaves or decaying tissue immediately to prevent the fungus from spreading to the rest of the rosette.

2 Apply an organic fungicide to treat the remaining healthy tissue and protect against further fungal growth.

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3 Adjust your watering routine to avoid getting water in the center of the rosette, and use a moisture meter to ensure the soil is dry before re-watering.