Silene laciniata 'Jack Flash'

RHS Plant Profile
Mexican campion 'Jack Flash'

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Synonyms

Silene laciniata 'Starburst'
Silene 'Jack Flash'
Silene italica 'Jack Flash'

Herbaceous Perennial
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A deciduous perennial reaching 60cm. It green leaves bright orange-red flowers with five, deeply divided petals through summer and autumn

Position

Full sun

Soil Types

Chalk, Loam, Sand

Max Height

0.5-1 metres

Max Spread

0.5-1 metres

Size

Time to Maturity
2–5 years
Max Spread
0.5-1 metres
Max Height
0.5-1 metres

Growing Conditions

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

Position

Full sun
Aspect
East–facing or North–facing or South–facing or West–facing
Exposure
Exposed or 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
Caryophyllaceae
Native to GB/Ireland
No
Foliage
Deciduous
Habit
Clump forming
Genus
Silene can be annuals, biennials or herbaceous or evergreen perennials, with opposite, untoothed leaves and solitary or clustered flowers with 5, usually notched petals
Name Status
Accepted

How to Grow

Cultivation

Grow in any well-drained but moisture-retentive soil in good light

Propagation

Propagate by seed or by division

Suggested planting locations and garden types

  • Cottage and informal garden
  • Wildflower meadow
  • Gravel garden
  • Flower borders and beds

Pruning

No pruning required

Pests

May be susceptible to slugs and snails

Diseases

May be susceptible to Powdery mildews