Buddleja asiatica

RHS Plant Profile
Asian butterfly bush

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Tender evergreen shrub about 3m tall, with widely-spaced, dark green leaves 30cm long, felted grey on the undersides. The tiny, white flowers in long, narrow spikes are sweetly scented and appear in late winter and early spring

Position

Full sun

Soil Types

Chalk, Loam, Sand

Max Height

2.5-4 metres

Max Spread

2.5-4 metres

Size

Time to Maturity
2–5 years
Max Spread
2.5-4 metres
Max Height
2.5-4 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
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)
H3

Colour & Scent

Fragrance Flower
Season Stem Flower Foliage Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family
Scrophulariaceae
Native to GB/Ireland
No
Foliage
Evergreen
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
Correct
Plant Range
E Asia

How to Grow

Cultivation

Needs full sun, well-drained soil and a frost-fee location. Ideal for a large conservatory or greenhouse. See buddleja cultivation for more detailed advice

Propagation

Root semi-ripe cuttings in summer

Suggested planting locations and garden types

  • Mediterranean climate plants
  • Sub-tropical
  • Conservatory and greenhouse

Pruning

Pruning group 6, or pruning group 13 for wall-trained plants

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