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Symphyotrichum lateriflorum var. horizontale (Horizontal Calico Aster)

Horizontal Calico Aster, Aster lateriflorus 'Horizontalis', Aster lateriflorus var. horizontalis

AGM Award
Symphyotrichum lateriflorum var. horizontale,Horizontal Calico Aster, Aster lateriflorus 'Horizontalis', Aster lateriflorus var. horizontalis, violet aster, lavender aster

Compact, award-winning Symphyotrichum lateriflorum var. horizontale (Horizontal Calico Aster) is a bushy herbaceous perennial boasting wide-spreading branched sprays covered with small white flowers in late summer and fall. Particularly attractive, the flowers feature a purplish-red center disk surrounded by a ring of 8-15 white to lavender-tinged rays. The horizontal, stiff branches are clothed with small, narrow, dark green leaves which turn a nice coppery hue in late summer. A wonderful garden plant to be used in mixed borders or as a low-growing hedge. This Aster is easy to grow, long-lived, brings cheerful fall color, and is a great source of nectar for butterflies.

  • Recipient of the prestigious Award of Garden Merit of the Royal Horticultural Society for its noteworthy qualities.
  • Typically grows up to 2 ft. tall and wide (60 cm). May need some support.
  • Thrives in full sun or partial shade, in moderately fertile, medium moisture, well-drained soils. Provide good air circulation to avoid foliage diseases such as powdery mildew.
  • A vital ingredient of late summer and fall borders, cottage gardens, prairies, or butterfly gardens.
  • Generally pest free. Keep an eye out for verticillium wilt, powdery mildew, and gray molds.
  • Cut back in late autumn.
  • Propagate by division in spring.

Requirements

Hardiness 4 - 8
Heat Zones 1 - 8
Climate Zones 1, 1A, 1B, 2, 2A, 2B, 3, 3A, 3B, 4, 5, 6, 7, 8, 9, 10, 14, 15, 16, 17, 18, 19, 20, 21
Plant Type Perennials
Plant Family Compositae
Genus Aster
Common names Calico Aster, Aster
Exposure Full Sun, Partial Sun
Season of Interest Summer (Late)
Fall
Height 1' - 2'
(30cm - 60cm)
Spread 1' - 2'
(30cm - 60cm)
Spacing 24" (60cm)
Maintenance Low
Water Needs Average
Soil Type Chalk, Loam, Sand
Soil pH Acid, Alkaline, Neutral
Soil Drainage Well-Drained
Characteristics Plant of Merit, Showy
Native Plants United States, Maine, New York, New Hampshire, Maryland, Massachusetts, New Jersey, Delaware, Connecticut, Vermont, Rhode Island, Pennsylvania, Northeast, Southeast, Midwest, Wisconsin, Minnesota, Illinois, Missouri, Michigan, Arkansas, Kentucky, Georgia, Florida, Mississippi, Alabama, West Virginia, Virginia, Tennessee, North Carolina
Attracts Butterflies
Garden Uses Beds And Borders, Hedges And Screens
Garden Styles Coastal Garden, Informal and Cottage, Prairie and Meadow
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Alternative Plants to Consider

Symphyotrichum leave ‘Bluebird’ (Smooth Aster)
Ampelaster carolinianus (Climbing Aster)
Doellingeria umbellata (Flat-Topped White Aster)
Aster novi-belgii (New York Aster)
Symphyotrichum chilense (Pacific Aster)
Symphyotrichum lanceolatum (White Panicle Aster)

Recommended Companion Plants

Verbena bonariensis (Tall Verbena)
Sedum ‘Matrona’ (Stonecrop)
Persicaria amplexicaulis ‘Rosea’ (Mountain Fleece)
Rudbeckia fulgida var. deamii (Black-Eyed Susan)

Find In One of Our Guides or Gardens

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25 Types of Daisies You Should Grow
Aster novae-angliae (New England Aster)
Aster novi-belgii (New York Aster)
Aster amellus (Italian Aster)
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.
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Requirements

Hardiness 4 - 8
Heat Zones 1 - 8
Climate Zones 1, 1A, 1B, 2, 2A, 2B, 3, 3A, 3B, 4, 5, 6, 7, 8, 9, 10, 14, 15, 16, 17, 18, 19, 20, 21
Plant Type Perennials
Plant Family Compositae
Genus Aster
Common names Calico Aster, Aster
Exposure Full Sun, Partial Sun
Season of Interest Summer (Late)
Fall
Height 1' - 2'
(30cm - 60cm)
Spread 1' - 2'
(30cm - 60cm)
Spacing 24" (60cm)
Maintenance Low
Water Needs Average
Soil Type Chalk, Loam, Sand
Soil pH Acid, Alkaline, Neutral
Soil Drainage Well-Drained
Characteristics Plant of Merit, Showy
Native Plants United States, Maine, New York, New Hampshire, Maryland, Massachusetts, New Jersey, Delaware, Connecticut, Vermont, Rhode Island, Pennsylvania, Northeast, Southeast, Midwest, Wisconsin, Minnesota, Illinois, Missouri, Michigan, Arkansas, Kentucky, Georgia, Florida, Mississippi, Alabama, West Virginia, Virginia, Tennessee, North Carolina
Attracts Butterflies
Garden Uses Beds And Borders, Hedges And Screens
Garden Styles Coastal Garden, Informal and Cottage, Prairie and Meadow
How Many Plants
Do I Need?
Explore Great Plant Combination Ideas
Aster
Guides with
Aster
Not sure which Aster to pick?
Compare Now

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