Tripleurospermum inodorum

RHS Plant Profile
scentless mayweed

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scentless mayweed RHS

Other common names

double mayweed, Mary's herb

Synonyms

Chrysanthemum inodorum
Matricaria inodora
Tripleurospermum maritimum subsp. inodorum

Annual Biennial Herbaceous Perennial

An erect or sprawling annual or short-lived perennial with branching stems, finely-divided, thread-like foliage and daisy-like flowerheads 3-5cm across with white ray florets surrounding a yellow centre

Position

Full sun

Soil Types

Chalk, Clay, Loam, Sand

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 Clay Loam Sand
Moisture
Moist but well–drained or Well–drained
pH
Acid or Alkaline or Neutral

Position

Full sun
Aspect
South–facing or East–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
Asteraceae
Native to GB/Ireland
Yes
Foliage
Deciduous
Habit
Columnar upright, Trailing
Genus
Name Status
Correct

How to Grow

Cultivation

Will grow in any soil in full sun; often found growing in disturbed soils, for example along roadsides and on arable land

Propagation

Propagate by seed

Suggested planting locations and garden types

  • Cottage and informal garden
  • Wildlife gardens
  • Wildflower meadow
  • Low Maintenance

Pruning

No pruning required but cut back after flowering to prevent seeds setting

Pests

Generally pest-free

Diseases

Generally disease-free