Why does your Hydrangea macrophylla Glowing Alps have brown leaf tips? Diagnose the cause and fix it with our step-by-step guide.
Hydrangeas have large, thin leaves with high transpiration rates. If the soil dries out too quickly or air humidity is low, the plant cannot transport water to the furthest edges of the leaf, causing tip necrosis.
Excessive buildup of mineral salts from fertilizers or hard tap water can create osmotic stress. This prevents the 'Glowing Alps' variety from absorbing water, leading to crispy, brown leaf margins.
Hot, dry winds or sudden temperature fluctuations can cause rapid moisture loss from the leaf tips. This is particularly common in 'Glowing Alps' when placed in sunny spots without adequate protection.
While tip burn is often dry, much can be caused by soggy soil that prevents roots from functioning. If the roots are suffocating due to lack of oxygen, they cannot supply water to the leaf extremities.
Your plant might also be experiencing one of these issues:
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