Lythrum salicaria 'Robert'

RHS Plant Profile
purple loosestrife 'Robert'

Save a plant

Where do you want to save Lythrum salicaria 'Robert'?

Plants I own
Wishlist
Go to My Plants
purple loosestrife 'Robert' RHS
purple loosestrife 'Robert' visionspictures.com

Synonyms

Lythrum 'Robert'

Plants for pollinators
Herbaceous Perennial
Thank you - your purchase supports our charity work Buy this from RHS Plants Shop
Buy online from £8.99Buy this from Plant Nurseries
36 Suppliers

A clump-forming perennial to around 90cm tall with lance-shaped downy leaves, and racemes of bright pink flowers borne on erect stems in summer

Position

Full sun

Soil Types

Clay, Loam

Max Height

0.5-1 metres

Max Spread

0.1-0.5 metres

Size

Time to Maturity
2–5 years
Max Spread
0.1-0.5 metres
Max Height
0.5-1 metres

Growing Conditions

Clay Loam
Moisture
Poorly–drained
pH
Acid or Alkaline or Neutral

Position

Full sun
Aspect
West–facing or South–facing or East–facing
Exposure
Exposed or Sheltered
Hardiness

Hardiness Ratings

All ratings refer to the UK growing conditions unless otherwise stated. Minimum temperature ranges (in degrees C) are shown in brackets

  • H1A: under glass all year (>15C)
  • H1B: can be grown outside in the summer (10 - 15)
  • H1C: can be grown outside in the summer (5 - 10)
  • H2: tolerant of low temperatures, but not surviving being frozen (1 to 5)
  • H3: hardy in coastal and relatively mild parts of the UK (-5 to 1)
  • H4: hardy through most of the UK (-10 to -5)
  • H5: hardy in most places throughout the UK even in severe winters (-15 to -10)
  • H6: hardy in all of UK and northern Europe (-20 to -15)
  • H7: hardy in the severest European continental climates (< -20)
H7

Colour & Scent

Season Stem Flower Foliage Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family
Lythraceae
Native to GB/Ireland
No
Foliage
Deciduous
Habit
Clump forming
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

Grow in any reliably moist soil in full sun

Propagation

Propagate by division in spring

Suggested planting locations and garden types

  • Wildflower meadow
  • Cottage and informal garden
  • Wildlife gardens
  • Flower borders and beds

Pruning

Deadhead after flowering to prevent self-seeding

Pests

May be susceptible to slugs and snails

Diseases

Generally disease-free