New York Aster, Michaelmas Daisy
Symphyotrichum novi-belgii 'Henry III'

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)
Cultivar: Henry III
Synonym:Aster novi-belgii
Synonym:Aster prealtus
Synonym:Symphyotrichum prealtum
Synonym:Aster caerulescens
Synonym:Aster salicifolius

Category:

Perennials

Height:

12-18 in. (30-45 cm)

Spacing:

12-15 in. (30-38 cm)

15-18 in. (38-45 cm)

18-24 in. (45-60 cm)

Hardiness:

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)

USDA Zone 9a: to -6.6 C (20 F)

USDA Zone 9b: to -3.8 C (25 F)

Sun Exposure:

Full Sun

Danger:

Unknown - Tell us

Bloom Color:

Rose/Mauve

Purple

Bloom Time:

Late Summer/Early Fall

Mid Fall

Foliage:

Unknown - Tell us

Other details:

This plant is attractive to bees, butterflies and/or birds

Average Water Needs; Water regularly; do not overwater

Requires consistently moist soil; do not let dry out between waterings

Flowers are good for cutting

Suitable for growing in containers

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:

Non-patented

Propagation Methods:

By dividing the rootball

Seed Collecting:

N/A: plant does not set seed, flowers are sterile, or plants will not come true from seed

Regional

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

Hebron, Kentucky

Kasota, Minnesota

Knoxville, Tennessee

Freeland, Washington

Gardeners' Notes:

No details have been posted.