Why does your Hydrangea macrophylla Magical Colordream have yellow leaves? Diagnose the cause and fix it with our step-by-step guide.
This is common in Hydrangea macrophylla when soil pH is too high (alkaline), preventing the plant from absorbing iron. You will notice yellowing between the veins while the veins themselves remain dark green.
Excessive moisture in the root zone leads to anaerobic conditions, causing yellowing of older leaves as roots begin to rot. This prevents the 'Magical Colordream' from transporting oxygen and nutrients efficiently.
A lack of nitrogen causes a uniform yellowing that typically starts on older, lower leaves and progresses upward. This is often caused by leaching in heavy rain or depleted soil nutrients.
While hydrangeas love light, intense midday sun on 'Magical Colordream' can cause leaves to bleach or turn yellow before browning. This is particularly common if the plant is in a location with no afternoon shade.
Your plant might also be experiencing one of these issues:
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