Buddleja davidii Nanho Blue ('Mongo')

RHS Plant Profile
butterfly bush [Nanho Blue]

Save a plant

Where do you want to save Buddleja davidii Nanho Blue ('Mongo')?

Plants I own
Wishlist
Go to My Plants
butterfly bush [Nanho Blue] visionspictures.com
butterfly bush [Nanho Blue] visionspictures.com

Other common names

butterfly bush 'Nanho Petite Indigo'

Synonyms

Buddleja davidii 'Mongo'
Buddleja davidii 'Nanho Petite Indigo'
Buddleja davidii 'Petite Indigo'
Buddleja davidii Petite Indigo

Plants for pollinators
Shrubs
Buy this from Plant Nurseries
13 Suppliers

A deciduous shrub with neat, narrowly lance-shaped leaves and slender cylindrical panicles of light blue flowers 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
West–facing or South–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

Semi-ripe cuttings in summer and hardwood cuttings in autumn

Suggested planting locations and garden types

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

Pruning

Prune annually in early spring, cutting 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