Photo by Melody

PlantFiles: New York Aster, Michaelmas Daisy
Symphyotrichum novi-belgii

Family: Asteraceae (ass-ter-AY-see-ee) (Info)
Genus: Symphyotrichum (sim-fy-oh-TRY-kum) (Info)
Species: novi-belgii (NO-vee BEL-jee-eye) (Info)

Synonym:Aster novi-belgii
Synonym:Aster prealtus
Synonym:Symphyotrichum prealtum
Synonym:Aster caerulescens
Synonym:Aster salicifolius

3 vendors have this plant for sale.

4 members have or want this plant for trade.


36-48 in. (90-120 cm)

15-18 in. (38-45 cm)

USDA Zone 4a: to -34.4 C (-30 F)
USDA Zone 4b: to -31.6 C (-25 F)
USDA Zone 5a: to -28.8 C (-20 F)
USDA Zone 5b: to -26.1 C (-15 F)
USDA Zone 6a: to -23.3 C (-10 F)
USDA Zone 6b: to -20.5 C (-5 F)
USDA Zone 7a: to -17.7 C (0 F)
USDA Zone 7b: to -14.9 C (5 F)
USDA Zone 8a: to -12.2 C (10 F)
USDA Zone 8b: to -9.4 C (15 F)

Sun Exposure:
Full Sun


Bloom Color:

Bloom Time:
Late Summer/Early Fall


Other details:
Average Water Needs; Water regularly; do not overwater
This plant is attractive to bees, butterflies and/or birds

Soil pH requirements:
5.1 to 5.5 (strongly acidic)
5.6 to 6.0 (acidic)
6.1 to 6.5 (mildly acidic)

Patent Information:

Propagation Methods:
By dividing the rootball
From softwood cuttings

Seed Collecting:
Unknown - Tell us

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No positives
No neutrals
1 negative

Gardeners' Notes:

Negative coriaceous On Sep 29, 2014, coriaceous from ROSLINDALE, MA wrote:

New York asters and their hybrids are the best-selling asters in the USA, widely sold along with fall mums. They vary tremendously in height, from 6" dwarfs to giants over 6' tall. They also come in a tremendously wide range of colors, many in shades of pink or violet-blue but also white, purple, lavender, and ruby red.

However, many of them spread aggressively, and they are commonly troubled by rust, mildew, and verticillium wilt, which not only disfigure them but also affect their winter survival.

In 2013, the Chicago Botanic Garden published a comprehensive evaluation of 119 asters, written by Richard Hawke, to identify outstanding performers for midwestern gardens.

They planted five plants of each of 62 New York aster varieties. Only 18 varieties had at least one plant survive four years on their test plot. This was not due to hardiness issues, as the mildest winter had the most extensive attrition.

They concluded that most of these can be recommended only as seasonal annuals rather than long-term perennials in northern gardens. This agrees with my own experience and observations.

Of the New York asters, only two, 'Climax' and 'Rosenwichtel', were rated 'Good'.

Asters whose performance rated "excellent" included aromatic aster (S. oblongifolium), Tatarian aster (A. tatarica), heath aster (S. ericoides), calico aster (S. lateriflorum), and white wood aster (S. divaricata).

Personally, I don't much care for the last two, and from personal experience I can also recommend turbinate aster (S. turbinellum), smooth aster (S. laeve), and some selections of New England aster (S. novi-angliae).

In US commerce, New York asters, especially the short forms, are most commonly labeled "Aster dumosus", which, though botanically incorrect, has to be considered a synonym.


This plant has been said to grow in the following regions:

Merced, California
Gulf Breeze, Florida
Bridgewater, Massachusetts
Pinconning, Michigan
Frenchtown, New Jersey
Dayton, Ohio
Mount Hood Parkdale, Oregon
Spokane, Washington

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