Tripleurospermum maritimum

RHS Plant Profile

scentless mayweed

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Other common names

dog gowan, scentless matricary, sea mayweed, mayweed, scentless false chamomile

Synonyms

Matricaria maritima

Herbaceous Perennial

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An herbaceous perennial with an upright to spreading habit, reaching heights of up to 80cm. It has fleshy, finely divided, bright green leaves that are arranged alternately along the stem and produces white, daisy-like flowers with yellow centres up to 5cm in diameter from July to September

Position

Full sun, Partial shade

Soil Types

Loam, Sand

Size

Time to Maturity: 1–2 years

Growing Conditions

Loam Sand

Moisture: Moist but well–drained or Poorly–drained
pH: Alkaline or Neutral

Position

Full sun Partial shade

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: Asteraceae
Native to GB/Ireland: Yes
Foliage: Deciduous
Habit: Columnar upright
Genus
Name Status: Correct
Plant Range: Azores & Europe

How to Grow

Cultivation

Thrives in well-drained, sandy and saline soils, preferring full sun and tolerating harsh coastal conditions. See Creating wildflower meadows for further advice

Propagation

Propagate by seed, self seeds freely

Suggested planting locations and garden types

Coastal
Wildflower meadow
Wildlife gardens

Pruning

No pruning required

Pests

Generally pest-free

Diseases

Generally disease-free