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Centaurea montana ‘Amethyst Dream’ (Mountain Cornflower)

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Centaurea montana ‘Amethyst Dream’ (Mountain Cornflower) is a spreading, herbaceous perennial boasting radiant royal-purple, thistle-like flowers in late spring to early summer. Attracting bees, butterflies and other admirers, the blossoms appear atop the foliage of softly haired silver leaves. Trouble-free and easy to grow, this fanciful bloomer is a great choice for cottage gardens, sunny borders, or containers.

  • Grows up to 20 in. tall (50 cm) and 28 in. wide (70 cm).
  • Performs best in full sun or light shade in average, dry to moist, well-drained soils. Poor soils, heat and drought tolerant.
  • Good choice for beds and borders, cottage gardens, prairies and meadows, coastal gardens and containers. Great as cut flowers too!
  • No serious pest or disease issues. Keep an eye out for powdery mildew.
  • Deadhead regularly to prolong flowering, and cut back in fall.
  • Propagate by division in spring or autumn.
  • Centaurea montana species is native to Europe, where it grows in meadows and open woodland in the upper montane and sub-alpine zones. This popular garden perennial has become an invasive species in British Columbia, Canada.
  • Find where this species is invasive in the United States.

Requirements

Hardiness 3 - 9
Heat Zones 1 - 9
Climate Zones 2, 3, 4, 5, 6, 7, 8, 9, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24
Plant Type Perennials
Plant Family Compositae
Genus Centaurea
Common names Mountain Cornflower, Knapweed, Cornflower, Bachelor's Button
Exposure Full Sun, Partial Sun
Season of Interest Spring (Late)
Summer (Early)
Height 1' - 2'
(30cm - 60cm)
Spread 2' - 3'
(60cm - 90cm)
Spacing 30" (80cm)
Maintenance Low
Water Needs Low, Average
Soil Type Chalk, Clay, Loam, Sand
Soil pH Acid, Alkaline, Neutral
Soil Drainage Moist but Well-Drained, Well-Drained
Characteristics Cut Flowers, Showy
Attracts Bees, Butterflies
Garden Uses Beds And Borders, Patio And Containers
Garden Styles Informal and Cottage, Prairie and Meadow, Coastal Garden
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Alternative Plants to Consider

Centaurea cyanus ‘Jubilee Gem’ (Cornflower)
Centaurea dealbata (Persian Cornflower)
Centaurea dealbata ‘John Coutts’ (Persian Cornflower)
Centaurea cyanus ‘Black Gem’ (Cornflower)
Centaurea cyanus ‘Pinkie’ (Cornflower)
Centaurea cyanus ‘Snowman’ (Cornflower)

Recommended Companion Plants

Heuchera ‘Caramel’ (Coral Bells)
Aquilegia vulgaris (Columbine)
Hosta ‘Undulata’ (Wavy Plantain Lily)
Coreopsis verticillata ‘Moonbeam’ (Threadleaf Coreopsis)
Centranthus ruber (Red Valerian)
Lychnis coronaria (Rose Campion)

Find In One of Our Guides or Gardens

Stunning Blue Flowers to Enhance Your Garden’s Beauty
Best Annual Flowers and Plants to Spruce up Your Garden
Companion Planting With Annuals
Native Plant Alternatives to Centaurea cyanus (Cornflower)
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 3 - 9
Heat Zones 1 - 9
Climate Zones 2, 3, 4, 5, 6, 7, 8, 9, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24
Plant Type Perennials
Plant Family Compositae
Genus Centaurea
Common names Mountain Cornflower, Knapweed, Cornflower, Bachelor's Button
Exposure Full Sun, Partial Sun
Season of Interest Spring (Late)
Summer (Early)
Height 1' - 2'
(30cm - 60cm)
Spread 2' - 3'
(60cm - 90cm)
Spacing 30" (80cm)
Maintenance Low
Water Needs Low, Average
Soil Type Chalk, Clay, Loam, Sand
Soil pH Acid, Alkaline, Neutral
Soil Drainage Moist but Well-Drained, Well-Drained
Characteristics Cut Flowers, Showy
Attracts Bees, Butterflies
Garden Uses Beds And Borders, Patio And Containers
Garden Styles Informal and Cottage, Prairie and Meadow, Coastal Garden
How Many Plants
Do I Need?
Explore Great Plant Combination Ideas
Centaurea
Guides with
Centaurea
Not sure which Centaurea to pick?
Compare Now

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