What Are the Sunlight Requirements for hydrangea 'Setsuka-yae'?
Partial shade

hydrangea 'Setsuka-yae' · Hydrangea macrophylla 'Setsuka-yae'
Grows best in a moist but well-drained soil in partial shade, although tolerant of sun if the soil remains moist. See shrubby hydrangea cultivation for further advice
Partial shade