The genus Hydrangea goes far beyond the colourful and ubiquitous Hortensia of a million suburban front gardens; it offers a remarkable diversity and versatility, with attractive planting choices for gardens everywhere. From the tough mountain species that can take up to -30C in their stride, to the warm temperate lianas that can top twenty metres into a tree, different species are now being brought into play by breeders to provide new cultivars at a bewildering rate. This book picks up this challenge, helping readers choose the best hydrangeas for their particular gardens, no matter what the soil or situation.