Hydrangea paniculata 'Phantum' has football-sized, ivory white blooms that can grow up to 16" long and wide. This stately giant grows to 10' tall and uses ever inch to support the plush panicles of flowers this beautiful shrub adorns. If there's room, use Phantum Hydrangea in your inner city garden where city pollution will leave it unfazed. It also softens the corners of hardscapes and buildings effortlessly and can be used as a magnificent backdrop in your larger garden beds.