Why does your Geranium x Magnificum have sudden leaf drop? Diagnose the cause and fix it with our step-by-step guide.
Excessive moisture in the potting medium prevents oxygen from reaching the roots, leading to Pythium or Phytophthora species. As the root system decays, it can no longer support foliage, causing the plant to shed leaves rapidly.
Geraniums are sensitive to sudden fluctuations in temperature, particularly cold drafts or frost. A sharp drop in ambient temperature can trigger a stress response where the plant sheds leaves to conserve energy.
High humidity and poor air circulation around the foliage allow Botrytis cinerea to thrive. This fungus can cause rapid decay of leaf tissue and subsequent abscission, often starting near the stem junctions.
A lack of available nitrogen prevents the plant from maintaining chlorophyll and new growth. In severe cases, the plant will mobilize nitrogen from older leaves to support new buds, causing old leaves to drop.
Your plant might also be experiencing one of these issues:
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