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Herbaceous Perennial

Phlox paniculata 'Prospero'
  • RHS AGM
  • RHS Plants for pollinators

perennial phlox 'Prospero'

'Prospero' is an herbaceous perennial to 90cm tall, with dark green lance-shaped leaves and terminal panicles of fragrant, white-eyed, light lilac-purple flowers with pale-edged petals, in early summer

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Size
Ultimate height
0.5–1 metres
Time to ultimate height
2–5 years
Ultimate spread
0.1–0.5 metres
Growing conditions
Chalk
Clay
Loam
Moisture
Moist but well–drained
pH
Acid, Alkaline, Neutral
Colour & scent
StemFlowerFoliageFruit
Spring Green
Summer Purple White Green
Autumn
Winter
Position
  • Full sun
  • Partial shade
Aspect

West–facing or South–facing or East–facing

Exposure
Exposed or Sheltered
Hardiness
H7
Botanical details
Family
Polemoniaceae
Native to GB / Ireland
No
Foliage
Deciduous
Habit
Bushy
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 fertile, moist soil in full sun or partial shade

Propagation

Propagate by division in autumn or spring. Propagate by basal cuttings in spring or propagate by root cuttings in early autumn or winter

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

Deadhead to prolong flowering then cut down to the base in late autumn

Pests

Generally pest-free

Diseases

May be subject to a downy mildew and a leaf spot

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