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Dichroa versicolor 

Evergreen Hydrangea has a typical large, ball-type hydrangea flowerhead that starts off with tiny, brilliant white buds that look like tiny pearls. These buds open to tiny brilliant blue, star-like flowers. The real beauty is that the evergreen hydrangea maintains attractive green foliage all year round. It is compact and most of all a sun-hardy shrub that loves a generous amount of water and fertiliser.