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Buddleja davidii

Black Knight

To date this is possibly the deepest purple Buddleja. A fine cultivar with long tapering clusters of purple flowers with a yellow eye, these look amazing when in full bloom and will attract a range of butterflies to the garden. Easy to grow and drought tolerant once established, this undemanding deciduous shrub offers a long season of colour and interest.

History

Buddleja ‘Black Knight’ has been one of the most successful B. davidii cultivars ever released. A selection made by Ruys at the Moerheim Nursery, Dedemsvaart, Netherlands, circa 1959, it was accorded the RHS Award of Garden Merit in 1993.

  • Flower Colour: Intense purple
  • Habit: Free branching
  • Eventual height: 150-250cm (5-8ft) Spread: 150cm (5ft)
  • Hardiness: Very hardy - 20°C USDA zones 5-9
  • Leaf colour: Medium green
  • Flowering: Very floriferous. The flowers are 15-20cm (6-9") in length
  • Fragrance: Sweetly scented and rich in nectar
  • Situation: Prefers a sunny position
  • Wildlife: Good for bees, butterflies and other insects
  • Later in the year some close up images of the flowers and leaves will be added along with a botanical description.

Project Details

FAMILY

Scrophulariaceae

Place of Origin

Central China, west China and Japan

Plant Heritage

Accession Number BO25

All details of our collection are held on the main Plant Heritage database including plant name, accession number, date of accession and plant source.

AWARD OF GARDEN MERIT   

15 Buddleja were awarded an AGM  at the 2008-10 Wisley Trial.  It was mainly the  Buddleja davidii that were judged but we have many others in our 160+ collection which are worthy winners.

  • Genus Buddleja
  • Species davidii
  • Cultivar ‘Black Knight’ AGM
  • Category semi - deciduous shrub
  • Colours and sizes are approximate and are intended as a guideline, cultivation notes should be followed

Find out more about soil feeding, pruning and pest control.

Cultivation of Plants