Why does your Hydrangea macrophylla Magical Summergreen have yellow leaves? Diagnose the cause and fix it with our step-by-step guide.
Hydrangeas are heavy feeders and sensitive to soil pH; if the soil is too alkaline (pH > 6.5), the plant cannot absorb iron, resulting in bright yellow leaves with distinct green veins.
Excessive moisture in the soil prevents oxygen from reaching the roots, leading to metabolic failure and uniform yellowing of older leaves.
A lack of nitrogen prevents the production of chlorophyll, causing the entire leaf to fade from green to a pale yellow, usually starting with older leaves.
Magical Summergreen varieties require consistent moisture; extreme dry spells cause leaves to lose turgidity and turn yellow before eventually browning at the edges.
Your plant might also be experiencing one of these issues:
English
Italiano
