What Are the Moisture Requirements for hydrangea [Endless Summer]?
Moist but well drained
hydrangea [Endless Summer] · Hydrangea macrophylla Endless Summer ('Bailmer')
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
Moist but well drained