national PLANT NETWORK grower approved selections take the guesswork out of gardening. Nikko Blue Hydrangea is a timeless garden favorite prized for its large mophead blooms and lush full growth habit. It grows about 4 to 6 ft. tall and wide forming a rounded shrub that makes a beautiful statement in borders, foundation plantings, and mixed shrub beds. In early to mid summer, oversized flower clusters emerge in vivid blue tones when grown in acidic soil, with color shifting toward pink as soil pH becomes more alkaline. The bold blooms are complemented by large deep green leaves that provide season long texture and garden presence. This hydrangea thrives in partial shade and moist well drained soil and benefits from consistent watering, especially during hot weather. Nikko Blue Hydrangea delivers classic beauty, dramatic summer color, and reliable landscape performance year after year.