How to Water Chinese hydrangea vine?
Consistently moist root zone, add extra water during warm dry weather

Chinese hydrangea vine · Hydrangea ampla
Grow in any moist but well-drained soil in partial shade or grow in sun if soil remains reliably moist. Improve chalky soils with organic matter to support good growth. See climbing hydrangea cultivation\r\n for further advice
Consistently moist root zone, add extra water during warm dry weather