Why does your Hydrangea macrophylla Magical Candy Rock have yellow leaves? Diagnose the cause and fix it with our step-by-step guide.
This is the most common cause for Hydrangeas in alkaline soils. When soil pH is too high, the plant cannot absorb iron, resulting in interveinal chlorosis where leaves turn yellow while veins remain green.
Hydrangeas require consistent moisture but are highly susceptible to root rot if the soil stays saturated. Lack of oxygen to the roots prevents nutrient transport, leading to widespread yellowing of older leaves.
A lack of nitrogen in the soil prevents the production of chlorophyll. This typically manifests as a uniform yellowing starting from the older, bottom leaves of the plant and moving upward.
Magical Candy Rock varieties can experience leaf scorch and chlorosis during intense summer heat or direct midday sun exposure. This causes the edges to yellow or brown as the plant attempts to conserve moisture.
Your plant might also be experiencing one of these issues:
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