What Are the Moisture Requirements for silverleaf hydrangea?
Moist but well drained

silverleaf hydrangea · Hydrangea arborescens subsp. radiata
Also known as: white-leaved hydrangea
Grow in any moist but well-drained soil in partial shade or grow in sun if soil remains reliably moist. See shrubby hydrangea cultivation for more detailed advice
Moist but well drained