How to Water hydrangea 'Xian'?
Constant mild soil moisture essential, never allow root ball total dryness

hydrangea 'Xian' · Hydrangea macrophylla 'Xian'
Grow in moist but well-drained, humus rich soil, in a lightly shaded spot with shelter from cold, drying winds. Mulch annually in spring. Soil additives may be required to maintain specific flower colours. See shrubby hydrangea cultivation for more detailed advice
Constant mild soil moisture essential, never allow root ball total dryness