Nikko Blue Hydrangea is a superb shrub for accent, specimen or border use in semi-shaded areas, and is desired for the splendid, abundant, showy flower clusters. Its handsome green foliage sits on a boldly branched, mounded form, and blooms on old wood. When planted in acidic soils, it produces blue flowers; in more alkaline soils, the flower color may have a pink hue.