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Herbaceous Perennial

Phlox adsurgens
  • RHS AGM

northern phlox

A semi-evergreen perennial with a prostrate habit, forming a mat to 25cm high, with glossy, ovate to rounded green leaves. In late spring and early summer, produces clusters of star-shaped flowers to 2.5cm across, rich pink with paler central eyes, at the tips of flowering stems

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

East–facing or West–facing

Exposure
Sheltered
Hardiness
H5
Botanical details
Family
Polemoniaceae
Native to the UK
No
Foliage
Semi evergreen
Habit
Matforming, Spreading branched
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

Correct

How to grow

Cultivation

Prefers humus-rich, moist but well drained soil in partial or dappled shade, but will also grow in poorer soils and will tolerate some direct sun

Propagation

Propagate by seed, by softwood cuttings in spring, or by root cuttings in early autumn or winter

Suggested planting locations and garden types
  • City and courtyard gardens
  • Cottage and informal garden
  • Patio and container plants
  • Rock garden
  • Low Maintenance
  • Flower borders and beds
  • Garden edging
  • Ground cover
  • Underplanting of roses and shrubs
Pruning

No pruning required

Pests

May be susceptible to stem and bulb eelworms

Diseases

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

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