What Are the Moisture Requirements for hydrangea 'Trebah Silver'?
Moist but well drained

hydrangea 'Trebah Silver' · Hydrangea macrophylla 'Trebah Silver'
Best grown in moist but well-drained soil in part shade although tolerant of sun if soil remains moist. See shrubby hydrangea cultivation for more detailed advice
Moist but well drained