Alphabetical Plant Listing

Symphyotrichum lateriflorum var. horizontale (Horizontal Calico Aster)

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


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.
  • 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 mildews and grey moulds.
  • Cut back in late autumn.
  • Propagate by division in spring.

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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 Asters
Exposure Full Sun, Partial Sun
Season of Interest Summer (Late)
Fall
Height 1' – 2' (30cm – 60cm)
Spread 1' – 2' (30cm – 60cm)
Spacing 24" (60cm)
Water Needs Average
Maintenance Low
Soil Type Chalk, Loam, Sand
Soil pH Acid, Alkaline, Neutral
Soil Drainage Well-Drained
Characteristics Plant of Merit, Showy
Native Plants United States, Midwest, Illinois, Michigan, Minnesota, Missouri, Wisconsin, Northeast, Connecticut, Delaware, Maine, Massachusetts, Maryland, New Hampshire, New Jersey, New York, Pennsylvania, Rhode Island, Vermont, Southeast, Alabama, Arkansas, Florida, Georgia, Kentucky, Mississippi, North Carolina, Tennessee, Virginia, West Virginia
Attracts Butterflies
Garden Uses Beds and Borders, Hedges and Screens
Garden Styles Coastal Garden, Informal and Cottage, Prairie and Meadow

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By Peter Turner Photography, 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 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 Asters
Exposure Full Sun, Partial Sun
Season of Interest Summer (Late)
Fall
Height 1' – 2' (30cm – 60cm)
Spread 1' – 2' (30cm – 60cm)
Spacing 24" (60cm)
Water Needs Average
Maintenance Low
Soil Type Chalk, Loam, Sand
Soil pH Acid, Alkaline, Neutral
Soil Drainage Well-Drained
Characteristics Plant of Merit, Showy
Native Plants United States, Midwest, Illinois, Michigan, Minnesota, Missouri, Wisconsin, Northeast, Connecticut, Delaware, Maine, Massachusetts, Maryland, New Hampshire, New Jersey, New York, Pennsylvania, Rhode Island, Vermont, Southeast, Alabama, Arkansas, Florida, Georgia, Kentucky, Mississippi, North Carolina, Tennessee, Virginia, West Virginia
Attracts Butterflies
Garden Uses Beds and Borders, Hedges and Screens
Garden Styles Coastal Garden, Informal and Cottage, Prairie and Meadow

Great Plant Combination Ideas with Asters

Guides with Asters

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