Symphyotrichum, Fall Aster, Hardy Aster
Symphyotrichum 'Blue Autumn'

Synonym:Aster

Category
Perennials

Water Requirements
Average Water Needs; Water regularly; do not overwater

Sun Exposure
Full Sun

Foliage
Herbaceous

Foliage Color

Height
6-12 in. (15-30 cm)

Spacing
9-12 in. (22-30 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)

Where to Grow
Grow outdoors year-round in hardiness zone
Can be grown as an annual

Danger
N/A

Bloom Color
Blue-Violet

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

Bloom Size

Bloom Time
Late Summer/Early Fall

Other details

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
Patented

Propagation Methods
By dividing the rootball
From softwood cuttings

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