Why does your Hydrangea macrophylla Magical Revolution have yellow leaves? Diagnose the cause and fix it with our step-by-step guide.
In Hydrangeas, yellowing between the veins (interveinal chlorosis) while veins remain green is a classic sign of iron deficiency, often caused by high soil pH making iron unavailable to the plant.
Excessive moisture in the soil prevents oxygen from reaching the roots, leading to root decay which disrupts the plant's ability to transport nutrients throughout the foliage.
A lack of nitrogen causes a uniform yellowing that typically starts with the older, lower leaves on the hydrangea bush before moving to new growth.
While hydrangeas love moisture, extreme drought can cause leaves to wilt and turn yellow as the plant sacrifices older foliage to preserve core hydration.
Your plant might also be experiencing one of these issues:
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