Nierembergia scoparia 'Mont Blanc'

RHS Plant Profile
tall cup flower 'Mont Blanc'

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tall cup flower 'Mont Blanc' Dorling Kindersley 2003
Herbaceous Perennial Bedding

'Mont Blanc' is a compact perennial to 20cm, commonly grown as an annual, with small leaves and cup-shaped pure white flowers 2cm across in summer

Position

Full sun

Soil Types

Chalk, Clay, Loam, Sand

Max Height

0.1-0.5 metres

Max Spread

0.1-0.5 metres

Size

Time to Maturity
1–2 years
Max Spread
0.1-0.5 metres
Max Height
0.1-0.5 metres

Growing Conditions

Chalk Clay Loam Sand
Moisture
Moist but well–drained
pH
Acid or 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)
H3

Colour & Scent

Season Stem Flower Foliage Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family
Solanaceae
Native to GB/Ireland
No
Foliage
Deciduous
Habit
Bushy
Genus
Nierembergia can be annuals, perennials or shrubs, with simple, alternate leaves and cup-shaped or tubular flowers in summer
Name Status
Accepted

How to Grow

Cultivation

Best grown in a sunny, sheltered site in a moist but well-drained soil or grow in a container outside or under glass

Propagation

Propagate by seed or stem tip cuttings

Suggested planting locations and garden types

  • City and courtyard gardens
  • Patio and container plants
  • Cottage and informal garden
  • Flower borders and beds
  • Garden edging

Pruning

No pruning required

Pests

May be susceptible to aphids and glasshouse whitefly

Diseases

May be susceptible to a virus