Why does your Begonia Havana Pink 843 have yellow leaves? Diagnose the cause and fix it with our step-by-step guide.
Wax begonias are highly susceptible to root rot if the growing medium remains saturated. Excessive moisture prevents oxygen from reaching the roots, causing the plant to struggle with nutrient transport, which manifests as uniform yellowing of older leaves.
As a fast-growing cultivar, 'Havana Pink 843' has high nutrient demands. A lack of nitrogen prevents the formation of chlorophyll, leading to chlorosis that typically starts on older leaves and moves toward the new growth.
While begonias enjoy bright light, direct, harsh afternoon sun can scorch the foliage. Conversely, too much shade can cause the plant to lose efficiency in photosynthesis, leading to pale or yellowing leaves as it fails to produce energy.
Begonias are tropical plants that are sensitive to cold drafts and sudden temperature drops. Exposure to temperatures below 50°F (10°C) can shock the plant's metabolic processes, causing leaves to turn yellow and eventually drop.
Your plant might also be experiencing one of these issues:
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