Amberboa moschata 'The Bridge'

RHS Plant Profile
sweet sultan 'The Bridge'

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Annual Biennial

A branching annual to 60cm with grey-green leaves and pure white, sweetly scented, thistle-like flowers produced on strong, upright stems from late spring to early autumn

Position

Full sun

Soil Types

Chalk, Loam, Sand

Max Height

0.5-1 metres

Max Spread

0.1-0.5 metres

Size

Time to Maturity
1 year
Max Spread
0.1-0.5 metres
Max Height
0.5-1 metres

Growing Conditions

Chalk Loam Sand
Moisture
Well–drained
pH
Alkaline or Neutral

Position

Full sun
Aspect
West–facing or South–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 Flower
Season Stem Flower Foliage Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family
Asteraceae
Native to GB/Ireland
No
Foliage
Deciduous
Habit
Bushy
Genus
Amberboa are upright annuals or biennials with grey-green leaves and solitary flowers with a thistle-like centre of disc florets and outer rings of long, soft, fringed ray florets
Name Status
Unresolved

How to Grow

Cultivation

Resents root disturbance so best sown in situ in well-drained neutral or alkaline soil in a sunny, sheltered position. May require staking. See staking perennials for further advice.

Propagation

Propagate by seed

Suggested planting locations and garden types

  • Cottage and informal garden
  • Flower borders and beds
  • Cut flowers

Pruning

Dead-head to prolong flowering

Pests

Generally pest-free

Diseases

May be susceptible to Powdery mildews in dry summers