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Alpine RockeryHerbaceous Perennial

Phlox douglasii 'Iceberg'
  • RHS AGM

phlox 'Iceberg'

'Iceberg' is a mat-forming evergreen perennial with small awl-shaped leaves and blue-tinged white flowers 1.5cm in width, solitary or 2-3 in a cluster, in late spring and early summer

Synonyms
Phlox 'Iceberg'

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Size
Ultimate height
Up to 10cm
Time to ultimate height
5–10 years
Ultimate spread
0.1–0.5 metres
Growing conditions
Chalk
Loam
Sand
Moisture
Well–drained
pH
Acid, Alkaline, Neutral
Colour & scent
StemFlowerFoliageFruit
Spring Blue Black Green
Summer Blue Black Green
Autumn Green
Winter Green
Position
  • Full sun
  • Partial shade
Aspect

South–facing or East–facing

Exposure
Exposed
Hardiness
H6
Botanical details
Family
Polemoniaceae
Native to the UK
No
Foliage
Evergreen
Habit
Matforming
Genus

Phlox may be evergreen or herbaceous, mat-forming or erect perennials or shrubs, with simple leaves and salver-shaped flowers in terminal clusters

Name status

Accepted

How to grow

Cultivation

Grow in well-drained, fertile soil in full sun or partial shade

Propagation

Propagate by taking softwood cuttings of non-flowering stems in spring

Suggested planting locations and garden types
  • Cottage and informal garden
  • Gravel garden
  • Patio and container plants
  • Rock garden
  • Garden edging
Pruning

Deadhead to prolong flowering

Pests

Generally pest free

Diseases

Susceptible to powdery mildews and a leaf spot

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