Alphabetical Plant Listing

Centaurea atropurpurea (Dark Purple Knapweed)

Very Dark Purple Knapweed, Centaurea benoistii, Maroon cornflower, Cheirolophus benoistii


Centaurea atropurpurea (Dark Purple Knapweed) is a clump-forming, woody-based perennial with deep ruby-red, thistle-like flowers in summer. Attracting bees, butterflies and other admirers, the blossoms open from attractive bronze-colored scaled buds. They sit atop strong, upright stems above a rosette of feathery, silver-gray leaves. Native to Romania and the Balkan Peninsula, this striking plant with curious reddish - purple flowers is perfect for the water-wise garden.

  • Grows up to 36-40 in. tall (90-100 cm) and 18-24 in. wide (45-60 cm).
  • Performs best in full sun in fairly dry, poor, well-drained soils. This cornflower can be invasive if the soil is rich and moist. Drought tolerant once established.
  • Good choice for beds and borders, cottage gardens, prairies and meadows, coastal gardens and gravel gardens. Great as cut flowers too!
  • No serious pest or disease issues. Keep an eye out for powdery mildew. Deer and rabbit resistant.
  • Deadhead regularly to prolong flowering.
  • Propagate by seed sown in pots in a cold frame in spring or propagate by division in spring or autumn.
  • Centaurea atropurpurea is native to Romania and the Balkan Peninsula.

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Requirements

Hardiness 5 – 9
Plant Type Perennials
Plant Family Centaurea - Cornflowers
Exposure Full Sun
Season of Interest Summer (Early,Mid,Late)
Height 3' – 4' (90cm – 120cm)
Spread 1' – 2' (30cm – 60cm)
Spacing 24" (60cm)
Water Needs Low
Maintenance Low
Soil Type Chalk, Loam, Sand
Soil pH Acid, Alkaline, Neutral
Soil Drainage Well-Drained
Characteristics Cut Flowers, Showy
Tolerance Deer, Drought, Rabbit, Dry Soil
Attracts Butterflies
Garden Uses Beds and Borders
Garden Styles Coastal Garden, Gravel and Rock Garden, Informal and Cottage, Prairie and Meadow

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Great Plant Combination Ideas with Centaurea - Cornflowers

Guides with Centaurea - Cornflowers


Viktor Loki, 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 5 – 9
Plant Type Perennials
Plant Family Centaurea - Cornflowers
Exposure Full Sun
Season of Interest Summer (Early,Mid,Late)
Height 3' – 4' (90cm – 120cm)
Spread 1' – 2' (30cm – 60cm)
Spacing 24" (60cm)
Water Needs Low
Maintenance Low
Soil Type Chalk, Loam, Sand
Soil pH Acid, Alkaline, Neutral
Soil Drainage Well-Drained
Characteristics Cut Flowers, Showy
Tolerance Deer, Drought, Rabbit, Dry Soil
Attracts Butterflies
Garden Uses Beds and Borders
Garden Styles Coastal Garden, Gravel and Rock Garden, Informal and Cottage, Prairie and Meadow

Great Plant Combination Ideas with Centaurea - Cornflowers

Guides with Centaurea - Cornflowers

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