Buddleja davidi

Royal Red syn Royal Purple

A large semi deciduous shrub producing plumes of deep purple-red flowers throughout summer. Long mid green leaf with a felt like underside.

Fragrant flowers 20-25 cm long.

For a truer red and a plant more suitable for smaller gardens see B. ‘Miss Ruby’ or B. ‘Sugar Plum’



Buddleja davidii ‘Royal Red’ is an old American cultivar raised by Karle A. Lucal and introduced by the Good & Reese nursery of Ohio, USA. Patented in 1942 and introduced to the UK after the Second World War. The shrub was accorded the Royal Horticultural Society Award of Merit in 1950, and the Award of Garden Merit in 1993, this was reaffirmed 2010.


  • Flower Colour: Reddish purple
  • Habit: Erect
  • Eventual height: 200-250cm (6-8ft) Spread: 200-250cm (6-8ft)
  • Hardiness: Very hardy - 20°C USDA zones 5-9
  • Leaf colour: Medium green
  • Flowering: Very floriferous. The flowers are 20-25cm (8-9") in length
  • Fragrance: Sweetly scented and rich in nectar
  • Situation: Prefers a sunny position
  • Wildlife: Good for bees and butterflies
  • Later in the year some close up images of the flowers and leaves will be added along with a botanical description.

Project Details



Place of Origin

Central China, west China and Japan

Plant Heritage

Accession Number B032/B066

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


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 'Royal Red’ syn B. ‘Royal Purple’ 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