Why does your Hydrangea macrophylla Magical Rhapsody 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, iron becomes chemically unavailable to the plant. This results in interveinal chlorosis where leaves turn yellow while veins remain dark green.
Hydrangeas require consistent moisture, but 'Magical Rhapsody' is prone to root rot if the soil does not drain well. Excess water displaces oxygen in the soil, leading to general leaf yellowing and wilting.
A lack of nitrogen prevents the production of chlorophyll throughout the plant. Unlike iron chlorosis, nitrogen deficiency typically causes the entire leaf to turn a uniform pale yellow, starting with older leaves.
While 'Magical Rhapsody' loves morning sun, intense afternoon heat in unshaded locations can scorch the foliage. This thermal stress can cause leaves to bleach or turn yellow before eventually browning.
Your plant might also be experiencing one of these issues:
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