Symphyotrichum cordifolium (Blue Wood Aster)
Blue Wood Aster, Heart-Leaf Aster, Aster cordifolius
Symphyotrichum cordifolium (Blue Wood Aster) is a stout herbaceous perennial boasting branched, upright-arching stems topped by profuse clusters of daisy-like flowers in late summer and fall. Blooming for weeks, the flowers, usually less than 1 in. across (2.5 cm), feature golden-yellow centers surrounded by narrow rays ranging from dark blue to pale blue. Borne on smooth stems, their gentle color blends with almost any other color in the garden. The leaves are thin and sharply toothed, the lower leaves being heart-shaped (cordate) and the upper leaves being ovate to lanceolate. Tough and adaptable, Blue Wood Aster is an excellent choice for the mixed border where it makes a beautiful foil for other late-season perennials.
- Grows with a bushy habit, up to 2-5 ft. tall (60-150 cm) and 2 ft. wide (60 cm). May need staking
- Thrives in full sun to part shade in moderately fertile, dry to moist, well-drained soils. Prefers moist, rich soils, but avoid consistent moisture. Rabbit and deer resistant!
- A vital ingredient of late summer and fall borders, cottage gardens, prairies, or butterfly gardens. Asters are also valued for the excellent quality of their cut flowers.
- Asters are a great source of nectar for butterflies and are a must if you are trying to attract birds or butterflies!
- Propagate by division in spring. Cut back in late fall.
- Generally pest free. May suffer Verticillium wilt, powdery mildews, and gray molds
- Native to eastern and central North America.
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Requirements
Hardiness | 3
– 8 |
---|---|
Heat Zones | 1
– 8 |
Plant Type | Perennials |
Plant Family | Aster |
Exposure | Full Sun, Partial Sun |
Season of Interest |
Summer (Late) Fall |
Height | 2' – 5' (60cm – 150cm) |
Spread | 1' – 2' (30cm – 60cm) |
Spacing | 24" (60cm) |
Water Needs | Low, Average |
Maintenance | Low |
Soil Type | Chalk, Clay, Loam, Sand |
Soil pH | Acid, Alkaline, Neutral |
Soil Drainage | Moist but Well-Drained, Well-Drained |
Characteristics | Cut Flowers, Showy |
Native Plants | United States, Midwest, Illinois, Indiana, Iowa, Kansas, Michigan, Minnesota, Missouri, Nebraska, Ohio, South Dakota, Wisconsin, Northeast, Connecticut, Delaware, Maine, Massachusetts, Maryland, New Hampshire, New Jersey, New York, Pennsylvania, Rhode Island, Vermont, Southeast, Alabama, Arkansas, Georgia, Kentucky, Mississippi, North Carolina, South Carolina, Tennessee, Virginia, West Virginia |
Tolerance | Deer, Rabbit |
Attracts | Butterflies |
Garden Uses | Beds and Borders |
Garden Styles | Informal and Cottage, Traditional Garden |
By Jose Luis Vega, Shutterstock
While every effort has been made to describe these plants accurately, please keep in mind that height, bloom time, and color may differ in various climates. The description of these plants has been written based on numerous outside resources.
Requirements
Hardiness | 3
– 8 |
---|---|
Heat Zones | 1
– 8 |
Plant Type | Perennials |
Plant Family | Aster |
Exposure | Full Sun, Partial Sun |
Season of Interest |
Summer (Late) Fall |
Height | 2' – 5' (60cm – 150cm) |
Spread | 1' – 2' (30cm – 60cm) |
Spacing | 24" (60cm) |
Water Needs | Low, Average |
Maintenance | Low |
Soil Type | Chalk, Clay, Loam, Sand |
Soil pH | Acid, Alkaline, Neutral |
Soil Drainage | Moist but Well-Drained, Well-Drained |
Characteristics | Cut Flowers, Showy |
Native Plants | United States, Midwest, Illinois, Indiana, Iowa, Kansas, Michigan, Minnesota, Missouri, Nebraska, Ohio, South Dakota, Wisconsin, Northeast, Connecticut, Delaware, Maine, Massachusetts, Maryland, New Hampshire, New Jersey, New York, Pennsylvania, Rhode Island, Vermont, Southeast, Alabama, Arkansas, Georgia, Kentucky, Mississippi, North Carolina, South Carolina, Tennessee, Virginia, West Virginia |
Tolerance | Deer, Rabbit |
Attracts | Butterflies |
Garden Uses | Beds and Borders |
Garden Styles | Informal and Cottage, Traditional Garden |