Verbascum dumulosum

RHS Plant Profile
shrubby mullein

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a mat-forming evergreen subshrub to 30cm in height and width, with elliptic, hairy grey-green leaves and short racemes of bright yellow, 5-petalled flowers 1.5cm in width, the stamens with some purple hairs

Position

Full sun

Soil Types

Chalk, Loam, Sand

Max Height

0.1-0.5 metres

Max Spread

0.1-0.5 metres

Size

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

Growing Conditions

Chalk Loam Sand
Moisture
Well–drained
pH
Alkaline

Position

Full sun
Aspect
West–facing or East–facing or South–facing
Exposure
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
Evergreen
Habit
Bushy
Genus
Verbascum can be annuals, biennials, perennials or subshrubs mostly with hairy leaves and 5-petalled, saucer-shaped flowers
Name Status
Correct
Plant Range
Turkey

How to Grow

Cultivation

Grow in poor alkaline well-drained soil. Grow on its side in a wall crevice, or in a gravel or scree bed

Propagation

Propagate by semi-hardwood cuttings

Suggested planting locations and garden types

  • Coastal
  • Cottage and informal garden
  • Gravel garden
  • City and courtyard gardens
  • Rock garden
  • Mediterranean climate plants
  • Wildlife gardens
  • Flower borders and beds

Pruning

No pruning required

Pests

May be susceptible to caterpillars and figwort weevil

Diseases

May be susceptible to powdery mildews