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Annual Biennial

Agrostemma githago 'Ocean Pearl'

corncockle 'Ocean Pearl'

'Ocean Pearl' is a much-branched annual with narrow, greyish leaves and abundant, solitary white flowers, with fine dark speckling in the throat, in summer

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Size
Ultimate height
0.1–0.5 metres
Time to ultimate height
1 year
Ultimate spread
0.1–0.5 metres
Growing conditions
Loam
Sand
Moisture
Well–drained
pH
Acid, Alkaline, Neutral
Colour & scent
StemFlowerFoliageFruit
Spring Green Grey Silver
Summer White Green Grey Silver
Autumn
Winter
Position
  • Full sun
Aspect

West–facing or South–facing

Exposure
Exposed or Sheltered
Hardiness
H5
Botanical details
Family
Caryophyllaceae
Native to the UK
No
Foliage
Deciduous
Habit
Bushy
Potentially harmful
All parts, but particularly the seeds may cause severe discomfort if ingested. Wear gloves and wash hands after handling
Genus

Agrostemma are upright annuals with narrow, opposite leaves and solitary, 5-petalled, open trumpet-shaped flowers with long calyx lobes showing between the petals

Name status

Accepted

How to grow

Cultivation

Grow in poor, well-drained soil in full sun. Lax growth needs to be staked, deadhead to prolong flowering. Flowers are suitable for cutting and are attractive to bees

Propagation

Propagate by seed sown in-situ, self-seeds prolifically

Suggested planting locations and garden types
  • City and courtyard gardens
  • Cottage and informal garden
  • Flower borders and beds
Pruning

Cut back after flowering

Pests

Generally pest free

Diseases

Generally disease free

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