One of the Butterfly series, B. Purple Emperor is a compact cultivar good for small gardens or containers, producing a profusion of mauve-purple flowers.
History
Buddleja ‘Pyrkeep’ (selling name PURPLE EMPEROR) is a cultivar raised by Elizabeth Keep in her garden after her retirement from East Malling Research Station in 1983. Elizabeth’s main objective was to breed shorter cultivars with a range of colours.
Elizabeth produced a series of cultivars which were all named after British butterflies.