Hydrangea is a genus of about 70-75 species of flowering plants native to southern and eastern Asia and North and South America. Most arte shrubs 1-3 metres tall but some are small trees. They can be either deciduous or evergreen, though the widely cultivated temperate species are all deciduous. Hydrangeas have two flower arrangement hydrangeas. Mophead flowers are large round flowerheads resembling pom-poms as the name implies. In contrast, lacecap flowers bear round, flat flowerheads with a centre core of subdued, fertile flowers surrounded by outer rings of showy sterile flowers. In most of the hydrangea species the flowers are white but some species, i.e. macrophylla, can be blue, red, pink, light purple and dark purple.  Imagine having a hedge constructed of these beautiful, large flowering plants !!