Buddleja davidii Nanho Purple ('Monum')

RHS Plant Profile
butterfly bush [Nanho Purple]

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butterfly bush [Nanho Purple] RHS

Other common names

butterfly bush 'Nanho Petite Indigo', butterfly bush 'Nanho Purple'

Synonyms

Buddleja davidii 'Monum'
Buddleja davidii 'Petite Purple'
Buddleja davidii 'Nanho Petite Plum'
Buddleja davidii 'Nanho Petite Purple'

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A compact shrub with lance-shaped leaves and fragrant, light purple flowers in dense cylindrical panicles in summer and autumn

Position

Full sun

Soil Types

Chalk, Loam, Sand

Max Height

1.5-2.5 metres

Max Spread

1.5-2.5 metres

Size

Time to Maturity
2–5 years
Max Spread
1.5-2.5 metres
Max Height
1.5-2.5 metres

Growing Conditions

Chalk Loam Sand
Moisture
Well–drained
pH
Acid or Alkaline or Neutral

Position

Full sun
Aspect
South–facing or West–facing
Exposure
Exposed or Sheltered
Hardiness

Hardiness Ratings

All ratings refer to the UK growing conditions unless otherwise stated. Minimum temperature ranges (in degrees C) are shown in brackets

  • H1A: under glass all year (>15C)
  • H1B: can be grown outside in the summer (10 - 15)
  • H1C: can be grown outside in the summer (5 - 10)
  • H2: tolerant of low temperatures, but not surviving being frozen (1 to 5)
  • H3: hardy in coastal and relatively mild parts of the UK (-5 to 1)
  • H4: hardy through most of the UK (-10 to -5)
  • H5: hardy in most places throughout the UK even in severe winters (-15 to -10)
  • H6: hardy in all of UK and northern Europe (-20 to -15)
  • H7: hardy in the severest European continental climates (< -20)
H6

Colour & Scent

Fragrance Flower
Season Stem Flower Foliage Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family
Scrophulariaceae
Native to GB/Ireland
No
Foliage
Deciduous
Habit
Bushy
Genus
Buddleja can be evergreen or deciduous shrubs, occasionally trees or scrambling climbers with simple leaves and panicles of small, tubular fragrant flowers
Name Status
Trade

How to Grow

Cultivation

Grow in fertile well drained soil in full sun. See buddleja cultivation for more detailed advice

Propagation

softwood cuttings in summer and hardwood cuttings in autumn

Suggested planting locations and garden types

  • Wildlife gardens
  • City and courtyard gardens
  • Coastal
  • Flower borders and beds

Pruning

Prune annually in early spring back to a low framework, pruning group 6

Pests

May be susceptible to aphids, capsid bugs, caterpillars, earwigs, figwort weevils, glasshouse red spider mite, leaf and bud eelworm, and mullein moth

Diseases

May be susceptible to honey fungus, fungal leaf spot, and virus diseases