Zantedeschia Captain Fresco Sudden Leaf Drop - Causes & Fixes

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Overwatering and Root Rot

Calla Lilies are sensitive to waterlogged soil; excessive moisture leads to Phytophthora or Pythium, causing the plant to shed foliage as roots fail to transport nutrients. This is particularly common in 'Captain Fresco' if the drainage in its pot is insufficient.

Very Common

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How to confirm: Gently lift the plant from its pot to check if the rhizomes are mushy, dark, or emitting a foul odor.

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1 Immediately remove the plant from the pot and inspect the roots for mushy, dark, or foul-smelling decay; trim away any rotted sections using sterilized tools.

2 Repot the Calla Lily in a fresh, well-draining medium and ensure the container has adequate drainage holes to prevent water pooling.

Espoma Organic Potting Soil Mix

15.1 L

$22

In Stock

3 Use a soil moisture meter to monitor the substrate, ensuring you only water when the top inch of soil feels dry to avoid future waterlogging.

GROWIT Soil Moisture Meter SMM-V3

Water Meters

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Temperature Shock or Cold Drafts

Zantedeschia species are tropical perennials that thrive in stable warmth; sudden exposure to temperatures below 50°F (10°C) can trigger an immediate stress response resulting in leaf abscission.

Very Common

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How to confirm: Check if the plant is positioned near a window,-AC vent, or drafty door where temperature fluctuations occur.

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

2 Monitor the soil moisture closely, as temperature stress can disrupt watering needs; use a moisture meter to ensure the soil remains damp but not waterlogged.

GROWIT Soil Moisture Meter - Blue

Water Meters

$12

In Stock

3 If the plant continues to struggle with low light alongside temperature issues, supplement with a full-spectrum grow light to support recovery.

SANSI 15W Full Spectrum Grow Light

Grow Lights

$17

In Stock

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Fungal Leaf Spot (Botrytis)

High humidity combined with poor air circulation can cause Botrytis cinerea to develop on the variegated leaves. As the fungus degrades leaf tissue, the plant may drop entire leaves to mitigate the spread of infection.

Common

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How to confirm: Inspect the remaining foliage for small, water-soaked brown spots or fuzzy grey mold patches.

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1 Remove and discard all infected or dropping leaves immediately to prevent the fungus from spreading to healthy foliage.

2 Apply an organic fungicide to the affected areas to control the Botrytis growth and protect remaining leaves.

Bonide Captain Jack's Copper Fungicide 32 oz

0.9 L • 1 pcs • Organic

$12

In Stock

3 Improve air circulation around the plant and reduce humidity by avoiding overhead watering, ensuring the foliage dries quickly after moisture contact.

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Nutrient Deficiency (Nitrogen)

If the plant has been in the same potting medium for a long period, a lack of available nitrogen can cause the plant to reallocate resources from older leaves to new growth, leading to yellowing and dropping.

Common

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How to confirm: Observe if the oldest, lowest leaves are turning yellow before falling off compared to the newer growth.

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1 Apply a nitrogen-rich liquid fertilizer to provide immediate nutrient uptake and stop the leaf drop.