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Centaurea cyanus 'Blue Boy' (Cornflower 'Blue Boy')

Beginner
skill rating
1 hour care
per year
0.9m
Max height
0.6m
Max spread
1-2 years
To maturity

Plant details

Botanical name

Centaurea cyanus 'Blue Boy'

Other names

Cornflower 'Blue Boy'

Genus

Centaurea Centaurea

Variety or Cultivar

'Blue Boy' _ 'Blue Boy' is an upright annual forming a mound of deep blue double flowers in the summer.


Centaurea cyanus 'Blue Boy' is: Deciduous

Habit

Upright

Flower

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

Deadheading helps to prolong the flowering season.


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Where to grow

Centaurea cyanus 'Blue Boy' (Cornflower 'Blue Boy') will reach a height of 0.9m and a spread of 0.6m after 1-2 years.

Suggested uses

Beds and borders, Bees (attract & feed bees), Coastal, Containers, Flower Arranging, Wildflower, Wildlife

Cultivation

Grow in well-drained soil in full sun. Autumn sowing will produce larger, earlier-flowering plants.

Soil type

Loamy, Sandy

Soil drainage

Well-drained

Soil pH

Acid, Alkaline, Neutral

Light

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 cyanus 'Blue Boy'

Other names

Cornflower 'Blue Boy'

Genus

Centaurea Centaurea

Variety or Cultivar

'Blue Boy' _ 'Blue Boy' is an upright annual forming a mound of deep blue double flowers in the summer.

Foliage

Deciduous

Habit

Upright


Colour

Flower

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

Deadheading helps to prolong the flowering season.


Monthly care advice


Where to grow

Centaurea cyanus 'Blue Boy' (Cornflower 'Blue Boy') will reach a height of 0.9m and a spread of 0.6m after 1-2 years.

Suggested uses

Beds and borders, Bees (attract & feed bees), Coastal, Containers, Flower Arranging, Wildflower, Wildlife

Cultivation

Grow in well-drained soil in full sun. Autumn sowing will produce larger, earlier-flowering plants.

Soil type

Loamy, Sandy

Soil drainage

Well-drained

Soil pH

Acid, Alkaline, Neutral

Light

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 10, Zone 9, Zone 8, Zone 7, Zone 6, Zone 5, Zone 4, Zone 3, Zone 2

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Grown from seed each year.

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

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simon williams

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