Why does your Hydrangea macrophylla Magical Cleopatra have yellow leaves? Diagnose the cause and fix it with our step-by-step guide.
This is highly common in Hydrangeas when soil pH is too high (alkaline). In such conditions, the plant cannot absorb iron, leading to interveinal chlorosis where leaves turn yellow while veins remain dark green.
Hydrangeas require consistent moisture, but poorly draining soil leads to anaerobic conditions. This causes root rot, which prevents the plant from transporting nutrients, manifesting as overall leaf yellowing and wilting.
A lack of available nitrogen in the growing medium prevents chlorophyll production. This typically presents as a uniform yellowing starting from the older, lower leaves of the mophead.
While 'Magical Cleopatra' loves light, extreme midday summer sun can scorch the foliage. This heat stress disrupts photosynthesis and causes leaves to bleach or turn yellow before browning.
Your plant might also be experiencing one of these issues:
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