Echeveria Raindrops White Cottony Spots - Causes & Fixes

Jump to cause: Mealybugs Powdery Mildew Scale Insects

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Mealybugs

These small, soft-bodied insects produce a white, waxy, cottony secretion to protect themselves. In Echeveria, they often hide in the tight crevices between the fleshy leaves and at the base of the rosette.

Very Common

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How to confirm: Use a toothpick to gently probe the white spots; if they move or feel fuzzy/clumped, it is likely mealybugs.

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

2 Use a cotton swab dipped in isopropyl alcohol to manually remove the white cottony clusters from the leaf crevices and base of the rosette.

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

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Powdery Mildew

This fungal disease manifests as a white, dusty coating on the leaf surfaces. It thrives in Echeveria when there is high humidity and poor air circulation around the rosette.

Common

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How to confirm: Try wiping the spot with your finger; if it smears like dust rather than being a distinct physical 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 powdery mildew.

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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 fungus from spreading to healthy parts of the plant.

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Scale Insects

Certain types of scale can appear as white, bumpy spots on the leaves. While often more brownish, some species produce a white waxy coating that can resemble cottony patches from a distance.

Common

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How to confirm: Check if the 'spots' are hard or shell-like and firmly attached to the leaf surface.

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1 Treat the plant with an organic insecticide spray to eliminate the scale insects and their waxy coatings.

Bonide Captain Jack's Neem Oil 32 oz

0.9 L • 1 pcs • Organic

$10

In Stock

2 Manually remove visible scale insects and white patches using a cotton swab dipped in isopropyl alcohol.

3 Inspect nearby plants and use yellow sticky traps to monitor for any secondary pests like whiteflies or gnats.