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Herbaceous Perennial

Pentaglottis sempervirens
  • RHS Plants for pollinators

green alkanet

A coarse, bristly, tap-rooted perennial with a basal rosette of pointed, oval leaves up to 40cm long. Upright stems carrying smaller leaves, are topped with sprays of bright blue, forget-me-not flowers in spring and early summer

Other common names
evergreen alkanet
evergreen bugloss
Synonyms
Anchusa sempervirens

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

North–facing or East–facing or West–facing

Exposure
Sheltered
Hardiness
H6
Botanical details
Family
Boraginaceae
Native to the UK
No
Foliage
Deciduous
Habit
Bushy
Genus

Pentaglottis are robust, evergreen perennials with bristly leaves and stems and small flowers resembling forget-me-nots

Name status

Correct

Plant range
SW Europe

How to grow

Cultivation

Grow in humus-rich, damp soil in full or partial shade

Propagation

Propagate by seed, division or root cuttings

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

Deadhead to prevent self-seeding

Pests

Generally pest-free

Diseases

Generally disease-free

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