Why does your Zantedeschia Captain Signum have sudden leaf drop? Diagnose the cause and fix it with our step-by-step guide.
Excessive moisture in the substrate leads to anaerobic conditions, causing the rhizomes of Zantedeschia to decay. This prevents nutrient transport to the foliage, triggering the plant to shed leaves to conserve energy.
Calla Lilies are sensitive to sudden drops in temperature, especially below 55°F (13°C). Cold drafts or sudden temperature fluctuations cause the plant to enter a defensive dormancy, resulting in rapid leaf senescence.
High humidity combined with poor airflow can promote Botrytis blight in Zantedeschia. The fungus attacks the leaf tissue and stems, causing them to weaken and drop prematurely.
A lack of available nitrogen prevents the plant from maintaining chlorophyll levels in older leaves. As the plant mobilizes remaining nutrients to new growth, the older foliage turns yellow and drops.
Your plant might also be experiencing one of these issues:
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