Zantedeschia Captain Palermo Sudden Leaf Drop - Causes & Fixes

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Root Rot (Pythium or Phytophthora)

Excessive moisture in the substrate causes fungal pathogens to attack the rhizome and roots, leading to a sudden failure in water transport. As the root system decays, the plant sheds leaves rapidly to conserve remaining resources.

Very Common

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How to confirm: Gently lift the plant from its pot to check if the rhizome is mushy or has a foul odor.

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1 Immediately remove the plant from its current container and inspect the rhizome and roots for mushy, dark, or foul-smelling decay.

2 Prune away all dead or rotting roots using sterilized shears and repot the plant in a fresh, well-draining medium enriched with perlite to improve aeration.

3 Monitor the soil moisture levels closely using a moisture meter to ensure the substrate is allowed to dry out significantly between waterings, preventing future fungal outbreaks.

GROWIT Soil Moisture Meter - Blue

Water Meters

$12

In Stock

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Temperature Shock

Zantedeschia cultivars are sensitive to sudden drops in temperature or cold drafts. Exposure to temperatures below 50°F (10°C) can trigger a stress response resulting in rapid senescence and leaf drop.

Very Common

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How to confirm: Check if the plant has recently been moved near an open window, air conditioning vent, or drafty door.

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1 Immediately move the plant to a stable, warm environment away from cold drafts, windows, or air conditioning vents to prevent further temperature fluctuations.

2 Monitor the soil moisture closely using a moisture meter to ensure the plant is not being overwatered while in its stressed state.

GROWIT Soil Moisture Meter - Blue

Water Meters

$12

In Stock

3 Apply a microbial-based fertilizer to help the plant recover from environmental stress and support root zone development.

FoxFarm Bush Doctor Boomerang Liquid Plant Fertilizer 1 Pint

0.5 L • 1 pcs

$20

In Stock

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Extreme Drought Stress

Calla Lilies require consistently moist soil; once the rhizome reaches a critical dehydration point, it will shed leaves to reduce transpiration. This is often accompanied by wilting before the actual drop occurs.

Common

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How to confirm: Stick your finger deep into the pot to see if the growing medium is bone dry and pulling away from the edges of the container.

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1 Immediately check the soil moisture level at the root zone to assess the depth of dehydration.

GROWIT Soil Moisture Meter SMM-V3

Water Meters

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2 Thoroughly soak the soil to restore moisture to the rhizome, ensuring the water reaches the bottom of the pot.

Chapin 48000 0.5G Watering Can

2.3 L • Recycled Plastic

$12

In Stock

3 Apply a liquid seaweed fertilizer to help the plant recover from environmental stress and boost nutrient uptake.

FoxFarm Bush Doctor Kelp Me Kelp You Liquid Seaweed Fertilizer 1 Pint

0.5 L • 1 pcs

$20

In Stock

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Fungal Leaf Spot (Botrytis)

High humidity combined with poor airflow can lead to Botrytis cinerea, which causes lesions on the leaves. As the infection spreads, the plant may shed affected foliage entirely.

Common

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How to confirm: Inspect the remaining leaves for small, dark brown or black spots with fuzzy grey mold underneath.

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1 Remove and discard all heavily infected or decaying leaves immediately to prevent the fungal spores from spreading to healthy foliage.

2 Apply a fungicide to protect remaining healthy leaves and treat existing lesions.