Why does your Geranium sanguineum have yellow leaves? Diagnose the cause and fix it with our step-by-step guide.
Pet FriendlyGeranium sanguineum is quite drought-tolerant once established, but excessive moisture causes root hypoxia. This leads to chlorophyll breakdown, manifesting as yellowing foliage, often starting with the lower leaves.
As a vigorous perennial, this species requires consistent nutrients. A lack of nitrogen prevents the synthesis of chlorophyll, resulting in a uniform yellowing of older leaves as the plant mobilizes nutrients to new growth.
While hardy, sudden drops in temperature or frost can cause metabolic disruption. This stress often triggers the plant to shed older leaves via chlorosis as it enters a semi-dormant state.
In damp, poorly ventilated conditions, fungal pathogens can attack the root system of Cranesbill. This destroys the plant's ability to transport water and minerals, causing leaves to turn yellow and eventually wilt.
Your plant might also be experiencing one of these issues:
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