Hydrangea, Nikko Blue HydrangeaNikko Blue Hydrangea is a bold branching deciduous shrub that blooms on old wood. Its large serrated medium green leaves have no fall color. The color of the lacecap clusters depends on the soil PH acidic soils produce bright milky blue flowers, while alkaline soils produce pink hued flowers. The flowers are highly attractive to butterflies. Best bloom in partial sun and rich, moist well drained soils. Read about the introduction to our new Hydrangea