Why does your Hydrangea macrophylla Magical Flamenco have yellow leaves? Diagnose the cause and fix it with our step-by-step guide.
This cultivar is highly sensitive to soil pH. If the soil is too alkaline (above 6.5), the hydrangea cannot absorb iron, resulting in bright yellow leaves with distinct green veins.
Magical Flamenco requires consistent moisture but is prone to root rot if the soil does not drain well. Excess water deprives roots of oxygen, leading to a general yellowing of the foliage.
A lack of nitrogen prevents the plant from producing chlorophyll. Unlike iron chlorosis, nitrogen deficiency typically causes the entire leaf to turn a uniform pale yellow, starting with older leaves.
While hydrangeas love water, extreme drought can cause leaves to turn yellow and eventually brown/crisp as the plant enters survival mode to conserve moisture.
Your plant might also be experiencing one of these issues:
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