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Herbaceous Perennial

Lythrum salicaria 'Robin'
  • RHS Plants for pollinators

purple loosestrife 'Robin'

A clump-forming perennial with strongly upright, branching stems to 90cm tall, clad with narrowly lance-shaped leaves. Spikes of deep pink to purple-pink star-shaped flowers are produced over a long period during the summer

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

South–facing or West–facing

Exposure
Exposed or Sheltered
Hardiness
H7
Botanical details
Family
Lythraceae
Native to the UK
No
Foliage
Deciduous
Habit
Clump forming, Columnar upright
Genus

Lythrum can be annuals or herbaceous perennials, with simple leaves in opposite pairs and small star-shaped flowers in leafy racemes

Name status

Accepted

How to grow

Cultivation

Grown in any reliably moist or even wetter soil in full sun

Propagation

Propagate by division in spring

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

Deadhead after flowering

Pests

May be susceptible to slug and snail damage

Diseases

Generally disease-free

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