Silene uniflora 'Robin Whitebreast' (d)

RHS Plant Profile

sea campion 'Robin Whitebreast'

Other common names

double sea campion, witches' thimbles

Synonyms

Silene uniflora 'Alba Plena'
Silene uniflora 'Flore Pleno'
Silene maritima 'Robin White Breast'
Silene vulgaris subsp. maritima 'Flore Pleno'
Silene uniflora 'Weisskehlchen'
Silene maritima 'Flore Pleno'
Silene uniflora Weisskehlchen

Alpine Rockery Herbaceous Perennial

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A semi-evergreen perennial to 20cm tall forming a mat of grey-green, lance-shaped, fleshy leaves to 2cm long. Pompom-like, double white flowers are borne above the foliage on branched stems in summer

Position

Full sun

Soil Types

Chalk, 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 Loam Sand

Moisture: Moist but well–drained or Well–drained
pH: Alkaline or Neutral

Position

Full sun

Aspect: 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): H7

Colour & Scent

Season	Stem	Flower	Foliage	Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family: Caryophyllaceae
Native to GB/Ireland: No
Foliage: Semi evergreen
Habit: Matforming
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 a well-drained soil in a sunny position. Ideal for rock gardens, scree beds, gravel gardens, walls and alpine troughs

Propagation

Divide congested mats in spring

Suggested planting locations and garden types

Cottage and informal garden
Gravel garden
Rock garden
Coastal
Wildlife gardens
Flower borders and beds
Garden edging
Banks and slopes

Pruning

Deadhead after flowering

Pests

Generally pest-free

Diseases

Generally disease-free