Dodecatheon conjugens

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Bonneville shooting star

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Synonyms

Primula conjugens

Alpine Rockery Herbaceous Perennial
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A clump-forming, upright deciduous perennial to around 25cm in height, with rosettes of oval to lance-shaped glossy green leaves. Shooting star-shaped magenta pink flowers with a bright yellow band at the base and maroon to black anthers appear on short stems from April to May

Position

Full sun, Partial shade

Soil Types

Chalk, Clay, Loam, Sand

Max Height

0.1-0.5 metres

Max Spread

0.1-0.5 metres

Size

Time to Maturity
2–5 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 Partial shade
Aspect
East–facing or North–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)
H5

Colour & Scent

Season Stem Flower Foliage Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family
Primulaceae
Native to GB/Ireland
No
Foliage
Deciduous
Habit
Clump forming
Genus
Dodecatheon are summer-dormant herbaceous perennials with basal rosettes of simple leaves and erect or arching stems bearing umbels of cyclamen-like flowers with strongly reflexed petals
Name Status
Correct
Plant Range
USA

How to Grow

Cultivation

Grow in a moist but well-drained, humus-rich soil in shade. Suitable for woodland or rock garden

Propagation

Propagate by seed in pots in an open frame as soon as seed is ripe; seed needs exposure to cold before it will germinate or propagate by division in spring

Suggested planting locations and garden types

  • City and courtyard gardens
  • Cottage and informal garden
  • Rock garden
  • Flower borders and beds
  • Underplanting of roses and shrubs

Pruning

No pruning required

Pests

May be susceptible to slugs and snails

Diseases

Generally disease-free