Verbascum luridiflorum 'Blue Lagoon'PBR

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mullein 'Blue Lagoon'

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mullein 'Blue Lagoon' RHS

Synonyms

Verbascum 'Blue Lagoon'

Plants for pollinators
Annual Biennial Herbaceous Perennial
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A biennial or short-lived perennial producing upright stems to 75cm, growing from a rosette of basal leaves. Flowers are borne in loose spikes, opening in flushes throughout the summer. Petals of the flat flowers are blue, the centre of the flower and the protruding stamens are purplish with flecks of white

Position

Full sun

Soil Types

Chalk, Loam

Max Height

0.5-1 metres

Max Spread

0.1-0.5 metres

Size

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

Growing Conditions

Chalk Loam
Moisture
Well–drained
pH
Alkaline

Position

Full sun
Aspect
South–facing or West–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)
H4

Colour & Scent

Season Stem Flower Foliage Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family
Scrophulariaceae
Native to GB/Ireland
No
Foliage
Deciduous
Habit
Bushy
Genus
Verbascum can be annuals, biennials, perennials or subshrubs mostly with hairy leaves and 5-petalled, saucer-shaped flowers
Name Status
Accepted

How to Grow

Cultivation

Requires an alkaline, well-drained, poor soil in full sun. In fertile soil plants grow larger and need staking - see staking perennials

Propagation

Propagate by root cuttings in winter, or division in spring

Suggested planting locations and garden types

  • Coastal
  • City and courtyard gardens
  • Cottage and informal garden
  • Gravel garden
  • Wildlife gardens
  • Flower borders and beds

Pruning

Cut back old flower stems once flowering has finished

Pests

Figwort weevil and some moth caterpillars may be a problem

Diseases

May be susceptible to powdery mildews