Zantedeschia Captain Brunello Sudden Leaf Drop - Causes & Fixes

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Overwatering and Rhizome Rot

Excessive moisture in the substrate leads to anaerobic conditions, causing the rhizome of your Captain Brunello to decay. This prevents nutrient transport, leading to rapid senescence and sudden leaf drop.

Very Common

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How to confirm: Gently lift the plant to check if the base of the rhizome feels soft, mushy, or smells like decomposition.

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1 Immediately remove the plant from its current container and inspect the rhizome for any soft, mushy, or foul-smelling areas.

2 Prune away all decayed rhizome tissue using sterilized tools and repot the plant in a well-draining, fresh medium like Espoma Organic Potting Soil Mix to prevent further rot.

Espoma Organic Potting Soil Mix

15.1 L

$22

In Stock

3 Switch to a more breathable substrate by incorporating Legigo Organic Leca Clay Pebbles to improve aeration and prevent future anaerobic conditions.

Legigo 4LB Leca Clay Pebbles

Expanded Clay

$17

In Stock

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Temperature Shock (Cold Stress)

Zantedeschia cultivars are sensitive to sudden temperature drops. Exposure to drafts or temperatures below 10°C (50°F) triggers a stress response where the plant sheds foliage to conserve energy.

Very Common

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How to confirm: Check if the leaves turned limp or yellow immediately following a cold night or a draft from a window.

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1 Immediately move the plant to a stable, draft-free environment with temperatures consistently above 15°C (60°F) to prevent further foliage loss.

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

GROWIT Soil Moisture Meter - Blue

Water Meters

$12

In Stock

3 Once the plant stabilizes, apply a light feeding of liquid seaweed to help stimulate root recovery and nutrient uptake.

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

0.9 L • 1 pcs

$32

In Stock

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Fungal Pathogen (Botrytis cinerea)

High humidity combined with poor air circulation can cause Botrytis, which attacks the fleshy stems and leaves of Calla Lilies. The infection leads to rapid tissue breakdown and leaf shedding.

Common

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

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1 Remove and discard all infected or decaying leaves and stems immediately to prevent the fungus from spreading to healthy tissue.

2 Apply an organic fungicide to the plant to combat the Botrytis pathogen and protect remaining healthy foliage.

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 spacing plants further apart and avoiding overhead watering.

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Nutrient Deficiency (Nitrogen)

A lack of available nitrogen in the growing medium causes the plant to mobilize nutrients from older leaves to newer growth, resulting in yellowing and eventual drop.

Common

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How to confirm: Observe if the leaf drop started specifically with the oldest, lowest leaves turning pale yellow first.

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1 Apply a nitrogen-rich liquid fertilizer to the soil to replenish available nutrients and stop the mobilization of nitrogen from older leaves.