Why does your Begonia Monza Rose 140 have yellow leaves? Diagnose the cause and fix it with our step-by-step guide.
Begonias are highly susceptible to fungal pathogens like Phytophthora when the substrate remains saturated. Excessive moisture prevents oxygen from reaching the roots, leading to cell death and systemic yellowing of the leaves.
As a fast-growing cultivar, the Monza Rose requires consistent nutrient availability. A lack of nitrogen prevents the production of chlorophyll, causing older leaves to turn pale yellow before progressing to newer growth.
While Begonias tolerate partial shade, insufficient light prevents effective photosynthesis. The plant compensates by shedding older foliage, which loses pigment and turns yellow as the plant prioritizes energy for new nodes.
Begonias are tropical plants that thrive in stable warmth. Exposure to drafts or temperatures below 55°F (13°C) can shock the plant's metabolic processes, causing rapid chlorosis and leaf drop.
Your plant might also be experiencing one of these issues:
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