Hydrangea are a deciduous, summer flowering shrub with large, showy flowers.
Hydrangea are easy to grow and require only minimal pruning. They are not fussy about soil types and most, including the climbing Hydrangea, will grow in partial shade. Hydrangea are large shrubs from 1.5m - 3m (3-10ft) requiring a fair amount of growing space.
Hydrangea have large showy flower heads, predominately flowering in pink, mauve, blue, cream and white, and multicoloured such as Hydrangea macrophylla 'Merveille'. Some varieties of Hydrangea change colour depending on the pH of the soil, acid or alkaline. This applies to H. macrophylla, the mopheads and lacecaps varieties, where the flowers are blue when grown in an acid soil and pink if planted in alkaline soil; the white flowers are unaffected.
There are also some varieties of Hydrangea which have scented blooms, such as Hydrangea paniculata 'Wim's Red' and also some compact varieties H. panciulata Little lime ('Jane') and Hydrangea with beautiful delicate colours such as pink turning to white as in Hydrangea paniculata Vanille Fraise ('Renhy')
The range of Hydrangea is wide and varied, and many are illustrated below and also on Pinterest board. When selecting a Hydrangea for the garden it is best to check out the variety carefully, some will grow to around 3m which is a bit large for the average garden , but there are Macrophylla varieties which reach around 1.5m. a useful size for most gardens.