Hardy Buddleja Species & Cultivars


Buddleja japonica is a sparsely branched deciduous shrub which bears lavender-blue flowers in the summer. The plant produces a mass of fruit capsules after flowering and is relatively short lived. Not completely hardy the plant is best grown in a pot and provided with some degree of protection in the winter.




B. japonica was named and described by the English botanist, William Botting Hemsley in 1889 and introduced into cultivation in the western world in 1896.

A native of Japan found growing naturally on sunny stony slopes at elevations of 600-1600m.



  • Flower Colour: Lavender - blue
  • Habit: Sparsely branched shrub
  • Eventual height: 150cm (5ft)
  • Hardiness: Requires winter protection
  • Leaf colour: Green
  • Flowering: Summer
  • Fragrance:
  • Situation: Grow in a pot and provide protection in winter
  • Wildlife:

Project Details



Place of Origin


Plant Heritage

Accession Number B048

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


  • Genus Buddleja
  • Species japonica
  • Category Hardy Species 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