Buddleja davidi

Nanho Blue

Silvery willow-like foliage and compact habit are the signature qualities of the Nanho Group. If you require smaller less wild-looking shrubs, the Nanho cultivars are the Buddleja to go for.

The silvery grey green leaves provide the perfect backdrop for the lavender blue flowers. The blooms are slightly smaller than other Buddleja but the sheer numbers more than compensate for this.



Buddleja davidii ‘Mongo’ (selling name Nanho BLUE) is a cultivar raised and introduced by the wholesale Monrovia Nursery of California, USA in 1984. The shrub was accorded the RHS Award of Garden Merit in 2002, but was placed on the Sunset List for rescission in 2010 following the release of other compact forms with a superior hue.






  • Flower Colour: Lavender blue with an orange throat
  • Habit: Erect with pendulous flowers
  • Eventual height: 150-200cm (5-7ft) Spread: 100-150cm (3-5ft)
  • Hardiness: Very hardy - 20°C USDA zones 5-9
  • Leaf colour: Silvery green
  • Flowering: Very floriferous. The flowers are 25-30cm (9-12") in length
  • Fragrance: Scented
  • 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 B003/B214

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 'Nanho Blue’
  • 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