Kalanchoe Passion Nilus White Cottony Spots - Causes & Fixes

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

search Possible Causes

error

Mealybugs

These sap-sucking insects produce a white, waxy, cottony secretion to protect themselves while feeding on the fleshy leaves and stems of your Kalanchoe. They often cluster in the crevices between leaf nodes or near the base of the plant.

Very Common

lightbulb

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.

build How to fix it

shopping_cart Recommended Products

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 or neem oil to kill the insects and their waxy coating.

Bonide Captain Jack's Neem Oil 32 oz

0.9 L • 1 pcs • Organic

$10

In Stock

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

warning

Powdery Mildew

This fungal pathogen manifests as white, flour-like patches on the leaf surfaces, often appearing when humidity is high or airflow is poor around the succulent foliage. Unlike insects, it looks like a surface coating rather than distinct tufts.

Common

lightbulb

How to confirm: Check if the white substance can be wiped off easily with your finger and if it appears as a thin film across larger areas of the leaf.

build How to fix it

shopping_cart Recommended Products

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 your Kalanchoe and reduce humidity by avoiding overhead watering on the foliage.

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

Gonicc 8" Titanium Bypass Pruners GPPS-1003

Cutting Tools

$15

In Stock

warning

Cottony Blight (Botrytis)

While less common in succulents, high moisture levels on Kalanchoe petals or leaves can trigger Botrytis, which presents as fuzzy, greyish-white growth. This usually occurs if the plant is watered from above, leaving moisture trapped in leaf junctions.

Common

lightbulb

How to confirm: Inspect the base of the flowers and leaf crevices for soft, rotting tissue underneath the white fuzz.

build How to fix it

shopping_cart Recommended Products

1 Prune away all affected leaves and petals immediately to prevent the fungus from spreading to healthy tissue.

2 Apply an organic fungicide to treat the remaining plant tissue and protect against further infection.

Bonide Captain Jack's Neem Oil 32 oz

0.9 L • 1 pcs • Organic

$10

In Stock

3 Adjust your watering technique to avoid getting water on the leaves; instead, water the soil directly and ensure the plant has excellent airflow.