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Centaurea montana (Perennial cornflower)

Beginner
skill rating
1 hour care
per year
0.6m
Max height
0.5m
Max spread
1-2 years
To maturity

Plant details

Botanical name

Centaurea montana

Other names

Perennial cornflower, Mountain bluets, Knapweed, Mountain knapweed, Great blue-bottle, Mountain centaury

Genus

Centaurea Centaurea

Species

C. montana - C. montana is a low-growing perennial cornflower with electric blue flowers with a red centre in summer.


Centaurea montana is: Deciduous

Habit

Upright

Flower

Dark-blue in Spring; Dark-blue in Summer

Foliage

Green in Summer

How to care

Watch out for

Pests

Generally pest free

Powdery mildew Powdery mildew

General care

Pruning

Deadhead to prolong the flowering season.

Propagation

Sow seed in a cold frame in spring. Divide in autumn or spring.

Propagation methods

Division, Seed


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Where to grow

Centaurea montana (Perennial cornflower) will reach a height of 0.6m and a spread of 0.5m after 1-2 years.

Suggested uses

Beds and borders, Bees (attract & feed bees), Coastal, Cottage/Informal, Flower Arranging, Prairie planting, Wildflower, Wildlife

Cultivation

Grow in moist but well-drained soil in sun or partial shade. Typically requires staking. Autumn sowing will produce larger, earlier-flowering plants.

Soil type

Loamy, Sandy

Soil drainage

Well-drained

Soil pH

Acid, Alkaline, Neutral

Light

Partial Shade, Full Sun

Aspect

South, West

Exposure

Exposed, Sheltered

UK hardiness Note: We are working to update our ratings. Thanks for your patience.

Hardy (H4)

Companion plants

We do not currently have companion plants added for this plant.

Botanical name

Centaurea montana

Other names

Perennial cornflower, Mountain bluets, Knapweed, Mountain knapweed, Great blue-bottle, Mountain centaury

Genus

Centaurea Centaurea

Species

C. montana - C. montana is a low-growing perennial cornflower with electric blue flowers with a red centre in summer.

Native to

Europe

Foliage

Deciduous

Habit

Upright


Colour

Flower

Dark-blue in Spring; Dark-blue in Summer

Foliage

Green in Summer


How to care

Watch out for

Pests

Generally pest free

Specific diseases

Powdery mildew

General care

Pruning

Deadhead to prolong the flowering season.

Propagation

Sow seed in a cold frame in spring. Divide in autumn or spring.

Propagation methods

Division, Seed


Monthly care advice


Where to grow

Centaurea montana (Perennial cornflower) will reach a height of 0.6m and a spread of 0.5m after 1-2 years.

Suggested uses

Beds and borders, Bees (attract & feed bees), Coastal, Cottage/Informal, Flower Arranging, Prairie planting, Wildflower, Wildlife

Cultivation

Grow in moist but well-drained soil in sun or partial shade. Typically requires staking. Autumn sowing will produce larger, earlier-flowering plants.

Soil type

Loamy, Sandy

Soil drainage

Well-drained

Soil pH

Acid, Alkaline, Neutral

Light

Partial Shade, Full Sun

Aspect

South, West

Exposure

Exposed, Sheltered

UK hardiness Note: We are working to update our ratings. Thanks for your patience.

Hardy (H4)

USDA zones

Zone 9, Zone 8, Zone 7, Zone 6, Zone 5, Zone 4, Zone 3

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(10/05/2011)

(12/06/2012)

(22/05/2010)

(06/06/2011)

Centaurea montana, unknown type. SE England, June 2013. (26/06/2013)

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Soil types: Loamy, Sandy Tell us...
Soil drainage: Well-drained Tell us...
Soil pH: Acid, Alkaline, Neutral Tell us...
Light: Partial Shade, Full Sun Tell us...
Aspect: South, West Tell us...
Exposure: Exposed, Sheltered Tell us...
Hardiness: Hardy (H4) Tell us...

DISCUSS THIS PLANT

This plant is featured at Chelsea Flower Show 2009

Centaurea montana (Perennial cornflower) has been used in The HESCO Garden by Leeds City Council for Chelsea Flower Show 2009. read more

There are 20 active discussions about Centaurea montana (Perennial cornflower)

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