Rostrinucula dependens

RHS Plant Profile
weeping buddleja

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An unusual, hardy, deciduous shrub with arching stems of aromatic dark green foliage, similar to those of a buddleja, and pendulous racemes of spiky, whiskery-looking pale to lilac pink flowers which appear from the end of summer into the autumn. May be quite difficult to grow

Position

Full sun, Partial shade

Soil Types

Chalk, Loam, Sand

Max Height

1-1.5 metres

Max Spread

1-1.5 metres

Size

Time to Maturity
2–5 years
Max Spread
1-1.5 metres
Max Height
1-1.5 metres

Growing Conditions

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

Position

Full sun Partial shade
Aspect
East–facing or 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)
H4

Colour & Scent

Fragrance Foliage
Season Stem Flower Foliage Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family
Lamiaceae
Native to GB/Ireland
No
Foliage
Deciduous
Habit
Pendulous weeping
Genus
A genus of just two species of deciduous, flowering shrub, native to China with arching, lance-shaped, aromatic dark green foliage and long racemes of whiskery reddish-purple flowers
Name Status
Correct
Plant Range
China

How to Grow

Cultivation

Grow in a sheltered, warm location in well-drained, humus-rich soil and shelter from cold winds

Propagation

Propagate by seed

Suggested planting locations and garden types

  • City and courtyard gardens
  • Cottage and informal garden
  • Flower borders and beds

Pruning

Cut back in autumn after flowering and again in early spring. Will cope with restorative pruning if winter-damaged. See pruning group 3 or pruning group 4

Pests

Generally pest-free

Diseases

Generally disease-free