Delphinium

Delphiniums are one of the classic flowers of the traditional summer garden. Their tall upright spikes laden with intensely-coloured flowers are a feature of herbaceous borders, where they are best grown near the back to add height and drama. Although the flowering season is quite short, delphiniums can often be coaxed into producing a few later flowers if the flower spikes are cut down as soon as the blooms are over. 'The Black Arrow' is unusual, producing deep purple, almost black flowers that will add drama to any planting scheme.