Why does your Zantedeschia Captain Morelli have yellow leaves? Diagnose the cause and fix it with our step-by-step guide.
Zantedeschia species are highly susceptible to rhizome rot when the growing medium stays saturated. Excess water deprives roots of oxygen, causing the leaves to lose chlorophyll and turn yellow starting from the edges.
A lack of nitrogen prevents the plant from producing sufficient chlorophyll for its large foliage. In red Calla Lilies, this often manifests as a uniform yellowing of older leaves before progressing to new growth.
Red Calla Lilies are tropical perennials that thrive in warmth; sudden drops in temperature can trigger a physiological response resulting in leaf yellowing. Low temperatures slow down metabolic processes and disrupt nutrient transport.
While they love bright light, sudden exposure to intense, direct midday sun can scorch the foliage of 'Captain Morelli', leading to chlorosis and yellowing. Conversely, extreme shade can cause the plant to struggle with energy production.
Your plant might also be experiencing one of these issues:
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