Why does your Hydrangea macrophylla Magical Canzone have brown leaf tips? Diagnose the cause and fix it with our step-by-step guide.
Hydrangea macrophylla species are highly sensitive to transpiration rates. Dry air or hot winds cause the leaf margins to lose moisture faster than the roots can replace it, resulting in desiccated brown tips.
This cultivar requires consistent soil moisture to maintain turgor pressure. When the soil dries out completely between waterings, the plant sacrifices the furthest extremities of the leaf to conserve water, causing browning.
Excessive buildup of mineral salts from tap water or over-fertilization can cause osmotic stress. This prevents the 'Magical Canzone' roots from absorbing water effectively, leading to necrotic leaf edges.
While brown tips often look like drought, saturated soil leads to anaerobic conditions that kill root hairs. Once the roots begin to decay from fungal pathogens like Phytophthora, they can no longer transport water to the leaf tips.
Your plant might also be experiencing one of these issues: