Why does your Hydrangea heteromalla have brown leaf tips? Diagnose the cause and fix it with our step-by-step guide.
As a species native to the moist Himalayan foothills, Hydrangea heteromalla requires high ambient humidity. Dry air causes moisture to evaporate from leaf margins faster than the roots can replace it, leading to necrotic brown tips.
Excessive buildup of mineral salts from fertilizers can dehydrate the leaf edges. This is particularly common in container-grown Himalayan hydrangeas where drainage might be restricted.
Hydrangeas are highly sensitive to 'wet-dry' cycles. If the soil dries out completely before being watered again, the vascular system cannot deliver water to the furthest extremities of the leaf blade.
Some hydrangea varieties are sensitive to the heavy minerals or chlorine found in municipal tap water, which can manifest as localized necrosis at the leaf tips.
Your plant might also be experiencing one of these issues:
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