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Herbaceous Perennial

Polemonium 'Northern Lights'
  • RHS AGM
  • RHS Plants for pollinators

A compact, clump-forming deciduous perennial producing dark green leaves. Upright stems of clear blue, frangrant, sterile flowers with a yellow centre are produced in the spring and summer.

Synonyms
Polemonium caeruleum 'Humile'
Polemonium × richardsonii misapplied
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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
Clay
Loam
Sand
Moisture
Moist but well–drained, Well–drained
pH
Acid, Alkaline, Neutral
Colour & scent
StemFlowerFoliageFruit
Spring Blue Yellow Brown
Summer Blue Yellow Green
Autumn Green
Winter
Position
  • Full sun
  • Partial shade
Aspect

East–facing or South–facing or West–facing

Exposure
Exposed or Sheltered
Hardiness
H6
Botanical details
Family
Polemoniaceae
Native to the UK
No
Foliage
Deciduous
Habit
Clump forming
Genus

Polemonium can be annuals or herbaceous perennials or upright or spreading habit, with pinnate leaves and usually clustered, tubular, bell, or funnel-shaped flowers

Name status

Accepted

How to grow

Cultivation

Grow in any fertile,well drained but moist soil, preferably in full sun

Propagation

Divide in spring. This plant is sterile so will not set seed

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

Cut back to the base in late autumn

Pests

Generally pest-free

Diseases

May be susceptible to powdery mildew

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