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PlantFiles: Blue Wood Aster, Blue Heart-leaved Aster, Starwort
Symphyotrichum cordifolium

 
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Family: Asteraceae (ass-ter-AY-see-ee) (Info)
Genus: Symphyotrichum (sim-fy-oh-TRY-kum) (Info)
Species: cordifolium (kor-di-FOH-lee-um) (Info)

Synonym:Aster cordifolius
Synonym:Aster finkii
Synonym:Aster lowrieanus
Synonym:Aster plumarius
Synonym:Aster sagittifolius

4 vendors have this plant for sale.

4 members have or want this plant for trade.

Category:
Perennials

Height:
24-36 in. (60-90 cm)
36-48 in. (90-120 cm)
4-6 ft. (1.2-1.8 m)

Spacing:
12-15 in. (30-38 cm)

Hardiness:
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:
Light Shade
Partial to Full Shade

Danger:
N/A

Bloom Color:
Light Blue
Medium Blue
Violet/Lavender
White/Near White

Bloom Time:
Late Summer/Early Fall
Mid Fall

Foliage:
Herbaceous

Other details:
May be a noxious weed or invasive
This plant is attractive to bees, butterflies and/or birds
Average Water Needs; Water regularly; do not overwater
Self-sows freely; deadhead if you do not want volunteer seedlings next season

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
By dividing rhizomes, tubers, corms or bulbs (including offsets)
From seed; direct sow outdoors in fall
From seed; winter sow in vented containers, coldframe or unheated greenhouse

Seed Collecting:
Allow seedheads to dry on plants; remove and collect seeds

Click thumbnail
to view:

By poppysue
Thumbnail #1 of Symphyotrichum cordifolium by poppysue

By poppysue
Thumbnail #2 of Symphyotrichum cordifolium by poppysue

Profile:

1 positive
No neutrals
1 negative

Gardeners' Notes:

RatingAuthorComment
Positive plant_it On Jun 3, 2013, plant_it from Valparaiso, IN wrote:

Native to North America, plant this with spring blooming flowers to provide extended color and interest in the woodland garden well into autumn. It creeps by rootstocks to form a nice patch. Prefers part shade but can grow in shade. Distinctive heart-shaped leaves.

Negative poppysue On Jan 22, 2003, poppysue from Westbrook, ME (Zone 5a) wrote:

This aster grows wild around my property and to be honest, its self-seeding is quite a nuisance. It also spreads by runners and doesn't seem to be too fussy about the soil it weasels into. It prefers a little shade and the plants grow larger and more robust with adequate moisture. Hybrids on the market might be better behaved but this wild species should be confined to the wildflower garden.

Regional...

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

Gainesville, Georgia
Lula, Georgia
Valparaiso, Indiana
Florence, Mississippi
Frenchtown, New Jersey
Clyde, North Carolina
Malvern, Pennsylvania
Nashville, Tennessee
Leesburg, Virginia



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