What Are the Moisture Requirements for Hydrangea paniculata 'Shikoku Flash'?
Moist but well drained

Hydrangea paniculata 'Shikoku Flash' · Hydrangea paniculata 'Shikoku Flash'
Thrives in humus rich soil, that is consistently moist but not waterlogged. Position in sun or part-day shade; in warmer areas, plants may benefit from shade from hot afternoon sun. Mulch in spring, and provide shelter from cold, drying winds. See shrubby hydrangea cultivation for more detailed advice
Moist but well drained