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Kalimeris incisa 'Blue Star' (Japanese aster)

Kalimeris incisa 'Blue Star'

Japanese aster

A wonderful pot plant with long retail shelf life and rewarding garden and landscape performance. It loves heat and humidity and breezes through a drought like a champ. Single, one inch, pale blue, daisy-like flowers on a compact mound of green all summer. Resembles Felicia or Brachycomb - but it's hardy! Very popular in Europe and deserves much more recognition here. Many thanks to Ewald Hügen for introducing us to this gem!

Kalimeris incisa 'Blue Star' - 72 per flat Availability
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18 Inches


18-24 Inches


12-18 Inches

Bloom Color


USDA Hardiness Zone 5-9

Japanese aster Interesting Notes

As much as I am wowed by voluptuous blossoms, I like to champion the strong garden performers which have quieter charm. One whose charm seldom disappoints is an Asian Aster relative called Kalimeris incisa 'Blue Star'. This little number grows 15-18" tall and 18-24" wide, and begins its production of 1 1/2" lavender blue daisies in June, carrying on into autumn (I kid you not.) 'Blue Star' forms tidy clumps; it does not run, unlike some of the other Aster relatives that we have tried such as Asteromoea and Aster ageratoides. - Katherine Tracey, Avant Gardens

Here are some differences between AsterBoltonia and Kalimeris:
Aster: margins not scarious, unequal, overlapping in 2, usually many series, pappus bristles uniform
Boltonia: margins scarious, equal, overlapping in 2, usually many series, pappus bristles non-uniform
Kalimeris: margins scarious, equal, overlapping in 2, usually many series, pappus bristles uniform
Herbaceous Perennial Plants by Allan Armitage (p.615)

Kalimeris incisa 'Blue Star' Growing and Maintenance Tips

Easy to grow with hardly any maintenance! Prefers well-drained areas in full sun. Very similar to Boltonia and Aster; in fact, it can often be a little difficult to differentiate between them. Propagate by seed or cuttings. Cut back in late fall. Showiest in perennial beds in single or mass plantings.

Good Substitutions

Japanese aster Kalimeris integrifolia 'Daisy Mae'
Japanese aster Asteromea mongolica

Key Characteristics & Attributes

Full Sun
Full Sun
Part Sun
Part Sun
Cut Flower
Cut Flower
Drought Tolerant
Drought Tolerant

Additional Information

Soil Moisture Needs
Plug Type
Horticultural Plug
Season of Interest (Flowering)
Late Summer
Propagation Type