Tripolium pannonicum

RHS Plant Profile
sea aster

Other common names

blue daisy, purple chamomile, sea aster, sea sharewort, sea star, sea starwort, serapias turbith, tripoly

Synonyms

Tripolium vulgare
Aster tripolium

Herbaceous Perennial

Found all around the coast of the British Isles, this native aster is a biennial or short-lived perennial with narrowly oval, rather fleshy leaves on upright stems up to 1m tall. From mid-summer into early autumn produces sprays of daisy flowers with yellow centres and pale purple or pink petals, though there are forms with no petals. Fluffy, silvery seedheads follow in autumn. A good late nectar source for butterflies

Position

Full sun

Soil Types

Clay, Loam, Sand

Size

Time to Maturity
2–5 years

Growing Conditions

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

Position

Full sun
Aspect
South–facing or West–facing
Exposure
Exposed
Hardiness
H5

Colour & Scent

Season Stem Flower Foliage Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family
Asteraceae
Native to GB/Ireland
Yes
Foliage
Deciduous
Habit
Bushy
Genus
Name Status
Correct

How to Grow

Cultivation

A maritime plant mostly found on saltmarshes and tidal estuaries, occasionally on coastal cliffs and rocks. Likes a sunny, open position; tolerates salty wind and even occasional flooding

Propagation

Propagate by seed or by division

Suggested planting locations and garden types

  • Coastal
  • Cottage and informal garden
  • Flower borders and beds

Pruning

No pruning required. Can be cut down in late autumn or early spring

Pests

Generally pest-free

Diseases

Generally disease-free