How to Water hardy white-flowered hydrangea?
Consistently moist root zone, add extra water during warm dry weather

hardy white-flowered hydrangea · Hydrangea paniculata 'Grandiflora'
Also known as: large-flowered paniculate hydrangea
Grow in moist but well-drained soil in sun or partial shade
Consistently moist root zone, add extra water during warm dry weather