Why does your Hydrangea chinensis have yellow leaves? Diagnose the cause and fix it with our step-by-step guide.
This is common in Hydrangea chinensis when the soil pH is too alkaline, preventing the plant from absorbing iron. You will typically see interveinal chlorosis where veins remain green while the leaf tissue turns yellow.
A lack of nitrogen causes a more uniform yellowing across the entire leaf, starting with older, lower leaves. This prevents the plant from producing enough chlorophyll for photosynthesis.
Excessive moisture in the substrate deprives roots of oxygen, leading to root rot. This disrupts the vascular system's ability to transport nutrients, resulting in limp, yellowing foliage.
Hydrangea chinensis has high transpiration rates; insufficient water causes the plant to shed chlorophyll to conserve moisture. This often manifests as yellowing accompanied by crispy, brown leaf edges.
Your plant might also be experiencing one of these issues:
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