Why does your Dahlia have drooping leaves? Diagnose the cause and fix it with our step-by-step guide.
Dahlias have large, fleshy leaves that transpire water rapidly; when soil moisture is depleted, the plant loses turgor pressure, causing immediate wilting. This is particularly common during hot summer afternoons.
Excessive moisture in heavy soil leads to fungal pathogens like Phytophthora attacking the tuberous roots, preventing water uptake even when the soil is wet. This causes the foliage to droop despite moist conditions.
This fungal pathogen thrives in high humidity and can cause stems to weaken and leaves to wilt or develop brown spots. It often attacks during periods of frequent rain or heavy dew on Dahlia foliage.
Extreme-high temperatures can cause Dahlias to enter a temporary state of wilting to reduce surface area for transpiration. The plant usually recovers once temperatures drop in the evening.
Your plant might also be experiencing one of these issues:
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