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Herbaceous PerennialAlpine Rockery

Phlox douglasii 'Ice Mountain'

phlox 'Ice Mountain'

A compact, evergreen perennial forming a low mound of bright green, needle-like leaves topped with a profusion of saucer-shaped white flowers in spring and early summer

Synonyms
Phlox hoodii 'Ice Mountain'
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Size
Ultimate height
0.1–0.5 metres
Time to ultimate height
2–5 years
Ultimate spread
0.1–0.5 metres
Growing conditions
Chalk
Loam
Sand
Moisture
Well–drained
pH
Acid, Alkaline, Neutral
Colour & scent
StemFlowerFoliageFruit
Spring White Green
Summer White Green
Autumn Green
Winter Green
Position
  • Full sun
  • Partial shade
Aspect

South–facing or West–facing or East–facing

Exposure
Exposed or Sheltered
Hardiness
H6
Botanical details
Family
Polemoniaceae
Native to GB / Ireland
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

Unresolved

How to grow

Cultivation

Grow in well-drained soil in full sun or light shade

Propagation

Propagate by softwood cuttings in spring

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

Trim back after flowering

Pests

Generally pest-free

Diseases

May be susceptible to leafy gall, powdery mildews and leaf spot

Get involved

The Royal Horticultural Society is the UK’s leading gardening charity. We aim to enrich everyone’s life through plants, and make the UK a greener and more beautiful place.