Kalimeris incisa 'Blue Star'

RHS Plant Profile
Japanese aster 'Blue Star'

Save a plant

Where do you want to save Kalimeris incisa 'Blue Star'?

Plants I own
Wishlist
Go to My Plants
Japanese aster 'Blue Star' RHS / Joanna Kossak
Herbaceous Perennial
Thank you - your purchase supports our charity work Buy this from RHS Plants Shop
Buy online from £8.99Buy this from Plant Nurseries
12 Suppliers

A compact, clump-forming perennial to 50cm high forming a mound of oblong, dark green foliage. Daisy-like flowerheads are borne above the foliage from summer into autumn and comprise pale blue rays surrounding a bright yellow centre

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
Moist but well–drained
pH
Acid or Alkaline or Neutral

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)
H7

Colour & Scent

Season Stem Flower Foliage Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family
Asteraceae
Native to GB/Ireland
No
Foliage
Deciduous
Habit
Bushy
Genus
Kalimeris are deciduous perennials with smooth, narrow, rounded, toothed or lobed leaves. The daisy-like flowers have white, pink or purple ray florets and yellow centres, and are carried singly or in flat-topped clusters
Name Status
Accepted

How to Grow

Cultivation

Grow in moist but well-drained, fertile soil in full sun

Propagation

Propagate by division

Suggested planting locations and garden types

  • Cottage and informal garden
  • Prairie planting
  • City and courtyard gardens
  • Cut flowers
  • Flower borders and beds

Pruning

Cut down to ground level once flowering has finished

Pests

Generally pest-free

Diseases

May be susceptible to powdery mildews