PlantsPicker Logo
person Sign In
Zantedeschia Cantor White Powder
eco White Powder

Zantedeschia Cantor – White Powder

Why does your Zantedeschia Cantor have white powder? Diagnose the cause and fix it with our step-by-step guide.

yard View full Zantedeschia Cantor care guide
Jump to cause: Powdery Mildew Mealybugs Mineral Deposits (Hard Water)

search Possible Causes

error

Powdery Mildew

This fungal disease is common in Calla Lilies when humidity is high and air circulation is poor. It manifests as white, flour-like spots on the leaves that can eventually cause them to yellow and wither.

Very Common
lightbulb
How to confirm: Inspect the underside of the leaves for fuzzy white patches that can be rubbed off with your finger.
build How to fix it
shopping_cart Recommended Products
1 Apply an organic fungicide to eliminate the fungal spores and prevent the disease from spreading to healthy leaves.
Bonide Captain Jack's Neem Oil 32 oz
Bonide Captain Jack's Neem Oil 32 oz
0.9 L • 1 pcs • Organic
$10
In Stock
2 Prune and dispose of any heavily infected leaves to reduce the fungal load in the plant area.
3 Improve air circulation around the plant and reduce humidity by avoiding overhead watering.
warning

Mealybugs

These small, soft-bodied insects secrete a white, waxy, cottony substance to protect themselves. They cluster in the crevices of the Zantedeschia leaves and stems, feeding on plant sap.

Common
lightbulb
How to confirm: Look for tiny, slow-moving white insects nestled in the leaf axils or where the leaves meet the stem.
build How to fix it
shopping_cart Recommended Products
1 Isolate the plant immediately to prevent the mealybugs from spreading to other greenery and spray the affected areas with an organic insecticide.
Bonide Captain Jack's Neem Oil 32 oz
Bonide Captain Jack's Neem Oil 32 oz
0.9 L • 1 pcs • Organic
$10
In Stock
2 Use a cotton swab dipped in isopropyl alcohol to manually remove visible white waxy clusters from the crevices of the stems and leaves.
3 Monitor the plant closely using yellow sticky traps to capture any remaining adult insects or migrating larvae.
Super Ninja Fungus Gnat Traps - 30 Pack
Super Ninja Fungus Gnat Traps - 30 Pack
30 pcs
$7
In Stock
warning

Mineral Deposits (Hard Water)

If you are using tap water high in calcium or magnesium, white crusty deposits can form on the leaf surfaces as the water evaporates. This is not a biological pathogen but an accumulation of salts.

Common
lightbulb
How to confirm: Check if the white spots are hard and crusty rather than fuzzy, and if they appear specifically where water droplets have dried.
build How to fix it
1 Gently wipe the leaves with a soft, damp cloth to remove the accumulated mineral crust and prevent further buildup.
2 Switch to using distilled water, rainwater, or filtered water for future watering to prevent new calcium and magnesium deposits from forming.
3 Flush the soil thoroughly with distilled water to leach out excess mineral salts from the root zone.

Other Zantedeschia Cantor problems

Your plant might also be experiencing one of these issues:

eco Yellow Leaves chevron_right
eco Brown Leaf Tips chevron_right
eco Drooping Leaves chevron_right
eco Tiny Black Flies chevron_right
eco Sudden Leaf Drop chevron_right
eco Leggy Stems chevron_right
eco Fine Webbing chevron_right
local_hospital All symptoms eco All plants with white powder
favorite